Internet

 I have no Internet access and  the US and DS buttons on the modem are blinking. How do I solve this?

This article provides you with some tips for troubleshooting your XFINITY Internet connection

This article will explain what port forwarding is and how to use it on your in-home network. 

This article explains what XFINITY On Demand is and how to use it

How do I log into my XFINITY modem so I can manage my home network?

This article provides information on how to complete your XFINITY Wireless Gateway Self Install and Activation

This article helps explains how to tell when a "Comcast" email is real or fraud

This article provides configuration settings for connecting your comcast.net to an email client

If you want to give other members of your household access to your XFINITY account, you can create a distinct username for each of them online. Additional XFINITY Usernames You can add up to six additional XFINITY usernames to your account. To create a new XFINITY username: Sign in to   My Account   as the primary user. Click the   Users   tab at the top of the page.   Underneath the current user portals, select the option to   Add a New User.   Fill out the   Add a New User   form with the new user's information.   On the same page, indicate if the new user is under 12 years old. If so, you must agree to the   COPPA Terms of Service. (Note:   Learn more about   The Children's Online Privacy Protection Act.)   Review the   Terms of Service   and the   Privacy Policy   by clicking on the links provided. If you agree, check the   I have read and agree to the Terms of Service and Privacy Policy   box.   Click   Add user. Note:   When you create a new user, the user won't have any   Permissions   to access or modify account settings and can only utilize some account features, like watching XFINITY TV online and using email (if you have XFINITY TV and Internet). Learn how to   set secondary XFINITY username permissions. 

This article provides detailed information about Comcast provided Wireless Gateways and their features. 

How to turn Bridge Mode on and off on Xfinity modem

How to connect to an Xfinity WiFi Hotspot

This article explains how to disable the XFINITY WiFi Hotspots on your Comcast modem

Once you have WiFi in your home, you’ll want to make sure you’re getting the most out of your connection. Older equipment and poor network configuration can slow down the speed of your WiFi connection in your home, which could lead to slower downloads, lagging online games and streaming video, and overall slower Internet performance. What else can impact the speed or performance of your network? Number of WiFi devices on your home network Interference from neighboring WiFi networks Limitations of individual WiFi devices Distance between the wireless gateway and your WiFi-enabled device (i.e. mobile phone, tablets, laptop, etc.) Physical factors (i.e. home construction, apartment vs. single home) Here are a few ways to improve your WiFi network. Wireless Gateway Placement Place your Gateway, modem or router in the most central location of your home, preferably on the main floor instead of the attic or basement. Make sure it is at least a couple of feet off of the floor and confirm that the coax cable connection is finger tight. Avoid putting your Gateway or router in cramped spaces or next to anything that can block the WiFi signal. The best position is in an open space away from thick surfaces (e.g., concrete walls) and other household electronics that may cause interference with the WiFi signal, such as baby monitors, cordless phones, microwave ovens, refrigerators and Bluetooth-connected devices. **Note**:  Consider adding Xfinity xFi Pods to help extend your home WiFi coverage throughout your home. To learn more and purchase, go to  xfinity.com/xfipods .   Minimize Interference For the best WiFi reception and the least interference from nearby wireless networks, place your wireless gateway in an open area, away from: Walls Furniture Metal surfaces (including computer cases) Halogen/fluorescent lighting Microwaves and refrigerators TVs and computer monitors Cordless phones (excluding DECT or 900MHz models) Baby monitors Large amounts of water (like aquariums and water heaters) Keep in mind that the WiFi-capable devices you connect to your in-home network play as important a role as the wireless gateway when it comes to range and speed issues. Additionally, locations that tend to have high WiFi usage, such as crowded neighborhoods and apartments, may affect your speeds, especially during peak hours.   Regularly Reboot Your Equipment Rebooting (or restarting) your Gateway, modem or router is good for the device's health and for your home WiFi performance. Doing this allows the device to update its software, if necessary, which can help optimize your connection and speed. Learn how to restart your WiFi equipment.   Confirm Your WiFi Network Sometimes you may be connected to your Gateway's public WiFi hotspot network ( xfinitywifi ) or secure hotspot network ( XFINITY ), which can limit your WiFi speed. Go to the WiFi settings of your device to make sure you're connected to your personal in-home WiFi network.   Connect High-Bandwidth Devices via Ethernet Whenever possible, plugging stationary devices directly into your Gateway or router using an Ethernet cable may provide optimal connectivity. For example, it's ideal for desktop computers, gaming consoles and video streaming devices to be connected with an Ethernet cable instead of connecting wirelessly, since activities on those devices use a lot of bandwidth (e.g., graphic-rich online gaming, movies or TV shows).   Check Bridge Mode and Antennae for Third-Party Routers If you use your own router along with your Gateway, make sure the Gateway is in bridge mode. Learn more about  bridge mode . You'll also want to position the antennae of your router so that one is pointing vertically (12 o'clock), and the other one is pointing horizontally (either 3 or 9 o'clock) to broadcast the strongest signal.   Consider a Different Speed Option If many devices access your home WiFi network at the same time, you may want to consider a higher speed tier to improve your network's performance. We offer several speed options to serve your needs. Visit My Account to see which level of Internet service you have and the upgrade options that are available.   Other Considerations If you use a separate router along with the wireless gateway, make sure the wireless gateway is in bridge mode. (See   Enable or Disable Bridge Mode on a Wireless Gateway.) To find out more about wireless networking, please see   What is WiFi?   to find out what WiFi is and how it works. For information on home networking and how to set up a home network, see   What is Home Networking?   Upgrading Your Modem Comcast provides several levels of Internet service offering different speeds, such as Performance, Blast! and Extreme 105 or Extreme 150. Your level of service is listed on your billing statement. Because some older modems and gateways can’t adequately support higher levels of Internet service, you may still be accessing the Internet at slower speeds, even if you’ve upgraded your plan. If you lease a modem/gateway from Comcast, you’ll want to upgrade your modem/gateway to make sure you’re getting the fastest network speeds possible. You can find a list of Comcast-approved modems and their specifications at the   DOCSIS Device Information Center. To find out more about upgrading your equipment, see   Upgrade Your Wireless Network Equipment.   For more information, see https://customer.xfinity.com/help-and-support/internet/improve-your-wireless-home-network/   Other Factors That May Impact WiFi Connectivity: Technical limitations of personal devices (e.g., an older phone that can't handle faster speeds, out of date operating systems, etc.) The distance between personal devices and your Gateway/modem/router Older devices which could be consuming bandwidth and slowing down your network

  This article outlines how to activate your Xfinity Internet/Xfinity Voice service if you rent an Xfinity xFi Gateway (Arris 1682G, Cisco 3941T, Arris 3482G, Technicolor CGM4140COM or Cisco DPC3939). To determine the type of Gateway you have, check the make and model information located on the bottom of your device. You can also log in to  My Account  and select  Devices  to view the make and model of your Gateway.   If you do not have an xFi-compatible Gateway, please see the activation instructions for other Wireless Gateway devices.     Activation Instructions Before you start: Download the Xfinity xFi app for free from the Apple App Store or Google Play. Launch the Xfinity xFi app and sign in using your Xfinity username and password. (You must be the primary or an unrestricted secondary user to access.) Select   I'm setting up my Wireless Gateway. After activation you can continue to use the Xfinity xFi app to manage your home network. Select   Get Started   to begin the process of setting up your Gateway. The entire process should not take longer than 20 minutes.   Select   Use Camera   to scan the QR code on the side or back of the device. The QR code should contain all of the information needed to begin activation. You may also be prompted to grant the Xfinity xFi app permission to access your smartphone's camera.   Note:   If your device does not have a QR code to scan, you will need to enter the 12-digit CM MAC number found on the side or back of the Gateway. Select   Enter Code Manually   and follow the on-screen prompts. You may also be prompted to enter the CM MAC number even if your device has a QR code if we need additional information. Your smartphone's camera will open within the Xfinity xFi app. Find the QR code and focus the camera on it. Once the QR code has been successfully scanned, you will see a green check mark. Note:   Keep your smartphone as steady as possible. If the camera has trouble focusing on the QR code, try slowly moving your smartphone away from and towards the QR code. The app will then take you through the necessary steps to set up your Gateway (modem/router) and activate your Xfinity Internet/Xfinity Voice service. For the best WiFi coverage, set up the device in the most centrally located place in your home where there is also a cable outlet. Also, avoid placing the device in your basement or attic as this can interfere with your WiFi signal. Keep it out of cabinets or closets, and make sure it is off of the floor. Select   Next   to proceed through these tips. Once you've found the best spot for your Gateway, follow the instructions to connect the coaxial cable and power cord. The lights on the front of your Gateway will flash and blink as the device prepares for activation. Select   Ready to Go!   to continue.   Now that your Gateway is connected, it's time to personalize your home WiFi network name and password. Enter a WiFi name and password that is easy to remember and secure. Select   Next. Confirm the WiFi name and password you entered are correct. If you need to make changes, simply select the back arrow in the top left-hand corner of the screen. If you are also activating Xfinity Voice, you will see your phone number on this screen. Select   Confirm and Finish Up. Note:   For customers swapping an existing xFi Gateway with a new one, you may be presented with the WiFi name and password associated with your previous device. You can choose to keep them the same, or create a new WiFi name and password. If you change the name/password, you'll need to reconnect all your devices using the new information. Your home network setup will now begin. This can take up to 10 minutes to complete. You will also be prompted to enable push notifications to be alerted when activation is complete. Once your Gateway is activated and your WiFi is ready to go, you'll be presented with instructions on how to connect to your new WiFi network. Two shortcuts are provided to make this process even easier. Simply copy your WiFi password to your clipboard by selecting   Copy   and then   Go to Settings. From there, go to the WiFi settings on your device, wait for your new WiFi name to show in the list of available networks, join the network and then paste your password to connect. Remember, you'll need to connect all of your WiFi-enabled devices using the WiFi name and password you created. Select   Continue to XFINITY xFi   to access home network personalization and control features, for example the ability to see who's most active on your network, troubleshoot any connection issues, and block inappropriate content and network threats. To learn more about xFi features, see the   overview for Xfinity xFi Web Portal and Mobile App.

In order to keep your Wifi network secure you may need to change your Xfinity Wifi password. Here are a couple of different ways to get that completed. 

How to find a compatible modem with your Xfinity Internet service

We see many questions in the forums regarding port forwarding, so I have put together a primer to try to help those who are new to the concept.   WARNING: Port Forwarding exposes devices on your LAN to the Internet. If you DO NOT NEED to port forward, DON'T. This guide tells you how to and why you might need to port forward. The reader assumes any and all responsibility for any damage of, or intrusions into their network caused by port forwarding. What is Port Forwarding? Port forwarding is a mechanism used in IPv4 to allow a computer, smartphone, or other device (the SOURCE) outside your Comcast HSI connection to connect to a device on your LAN (the DESTINATION). A typical Comcast residential user network might look something like this: In this diagram, a Cable subscriber (you) has a webcam, NAS, or media server on the internal LAN behind his router/gateway. It is configured to listen on TCP port 8080, in this case. Other devices or game servers that you have may be configured to listen on a different (or many different) ports, but the principle is the same. Let's say that the subscriber (you) want to make that server available to a family member in a different location, so they can see your webcam, or look at pictures on your media server or NAS. In order to do that, your family member needs to be able to connect, often using a web browser, or a smartphone app. The problem is that your web server is on your LAN, protected by the firewall in your router, AND it has a private address, which cannot be used on the internet. The private subnets you will see most commonly are the 192.168.0.0 and 10.0.0.0 subnets. Subnetting is beyond the scope of this discussion, as most home routers are set up out-of-the-box to use one of these submets. Under normal circumstances, you will probably never have to change this. The problem lies in the fact that these subnets cannot be routed over the internet. Port Forwarding is intended to solve that problem.   As seen in the diagram, your home router (and you must have a router of some type to perform port forwarding) is provided with an address on the public internet by Comcast. Because of a shortage of IPv4 addresses, home routers use Network Address Translation (NAT) to allow you to connect a large number of devices to your router, and give them the ability to connect to other devices on the internet. This is done by assigning each requested connection from your LAN a TCP port, so the router can track the connection. The combination of the IP address and port number is called a socket. So, when you use your computer on your LAN to go to www.google.com, your computer (the source) sends a request using a random port (usually above port 1024) to the destination (www.google.com) on port 80 (the standard http port. Because of NAT, the Google server sees your source address as the WAN IP of your router. How, you may ask. is this related to Port Forwarding? Well, port forwarding is essentially the same process, but in reverse. Think of it as inbound NAT. You router has a public IP address, but by default, it doesn't listen on many ports. This is for security, so that someone on the internet cannot easily get on to your network. Now, you have a media server or an IP Camera that you want Granny to see, so you have to tell your router to listen on a port so that you can give Granny a link to it that she can put in her web browser (how she does that we will discuss later).   How do I set up Port Forwarding   First, you have to set up your router. There is an excellent website at http://portforward.com, which will walk you through the steps of how to forward ports on just about every known router, so I am not going to go into detail on any particular model. Suffice to say that when you set up port forwarding, you tell your router to listen on a particular port (in the case of the diagram, it is port 8080), and you also tell it where to send that traffic, when it sees it. In this case, the router is told to send all traffic it ses incoming on port 8080 to the internal device at 192.168.1.200. Below is an example of the screen for configuring a Custom port forwarding service on a Netgear WNDR3700. Other router screens will look different. This is just one example:   OK, so I have set it up...how does Granny get there... Granny has a computer with a web browser. Lets say you are letting her see your IP Camera. instead of port 80, your IP Camera is designed to listen on port 8080. Under normal circumstances, you would forward the same port externally as the device listens on, so you would set up your port forwarding to listen on the WAN interface on port 8080, and internally, send all port 8080 traffic to the IP address of your IP camera. Now, when Granny browses google.com, she just types inwww.google.com in her browser, and it goes there, right? That is because google.com is listening on a well-known port for http traffic (port 80), and browsers automatically know that you want to go to port 80. What they don't know is that your router is waiting to send traffic to your IP Camera on port 8080, so when you tell Granny how to get to your camera, if you are using any port other that 80, you MUST specify the port, and that you are using the http protocol. So, you would tell granny to put the following in her browser address bar: http://<yourWANIP>:8080   To find the WAN IP of your router, you can either look at the Status page in your router interface, or browse tohttp://whatismyip.com If you don't want to give her an IP address, you would need to use some type of Dynamic DNS service (not within the scope of this discussion) to translate your WAN IP into a hostname, but you still need to specify http and the port number, like this: http://myipcam.somedomain.org:2000 (the actual name will depend on your Dynamic DNS provider) What else can I do with Port Forwarding?   The principles are the same for pretty much any device or server that you want to make available to sources outside your home. You can port forward Windows Remote Desktop Protocol, so you can log into your PC from another device with an RDP client. You can run a web server (although publicly accessible webservers are technically against the Comcast AUP for residential connections), you can access your own media server from your smartphone, so you can listen to your music wherever you are...the possibilities are pretty much endless, BUT make sure that you secure the devices you are allowing access to with strong passwords. While many security experts frown upon the concept of 'Security by Obscurity' I personally don't see that it hurts to change the port you are using for some services, especially the more common ones...Any hacker knows that Windows Remote Desktop Protocol runs on port 3389, so instead of setting your port forwarding up to listen on port 3389 on the WAN IP, use a different port (above 1024 is recommended. The highest you can go is 65535). You can still tell the router to forward the traffic to port 3389, so you don't have to mess around with the registry settings for your RDP setup on your Windows machine. That is basic port forwarding in brief. If you have any questions, please post it in the forums in the Home Networking / Router / & WiFi Gateway Help board and we will try to help. Be aware that as of writing this (April 2013) there appear to be some issues with port forwarding on some of the Comcast supplied gateway devices. Unfortunately, there isn't much we can do to remedy those, if you have set up port forwarding properly. The suggested solution is to have the gateway placed in bridge mode, and buy your own router to do your port forwarding. Also there are some quirks to setting up port forwarding on the SBG6580 gateway. See this post for details: http://forums.comcast.com/t5/Home-Networking-Router-WiFi/Port-Forwarding-for-an-IP-Camera/m-p/152957... ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 This article provides details on the personalization and control features available with XFINITY xFi. For more information on the xFi web portal and app for mobile devices, see our   xFi portal and app overview article. For xFi troubleshooting tips, see   troubleshooting WiFi connectivity.   Devices     In the  Devices  section, you can view all devices that are currently or were previously connected to your home network, as well as devices that have WiFi access currently paused.   Identifying Devices When a device first connects to your home network, the default name of the device, which is either the manufacturer-set name (i.e., hostname or MAC address) or the one you gave your device when you first set it up, will be displayed. Devices connected to the public Xfinity WiFi hotspot,  xfinitywifi , will not appear in your  Devices   list; hotspots are separate from your personal home network. If you do not recognize a device: Go to the   Devices   section. Select the device from the list, then select   Device Details   to see the manufacturer. If the device is connected to your home network, there should be a green dot indicating that it's online, which may also help with identifying what device it is. Access the hostname or MAC address in your device's settings. If the default name displayed is a long string of numbers and letters, it's likely the MAC address. For more information on recognizing devices or accessing the hostname or MAC address from your device settings, see our  xFi Frequently Asked Questions .     Personalizing and Organizing Devices You can personalize a device name for easier reference. Select the device to give it a nickname and choose an icon, then assign the device to a profile. If you have devices connected to your home network that still need to be personalized, you'll see that indicated at the top of the  Devices  section. Simply select  Personalize  to give the device a nickname and assign it to a profile.       Device Indicators   A   green dot   indicates the device is currently connected to your home network.   A   pause symbol   indicates the device is currently paused and cannot access your home network.   A   crescent moon symbol   indicates the device is currently in Bedtime Mode and cannot access your home network.   A   grayed-out device   icon means the device is not currently connected to your home network.     Removing Devices You can remove a device that is not connected from the  Devices  section by selecting the name of the device either from the  Devices   section or from the profile where the device is assigned, then select  Device Details > Forget Device . This will remove the device from the  Devices  section and unassign it from the profile it was associated with, if applicable. It will also permanently delete all historical network activity of this device. If the device reconnects to your home network, it will appear as a new device.     Pausing Devices Pausing a device blocks it from accessing the Internet when connected to your home network. In-progress activity might not stop immediately. Access to local network devices (like printers) and connections that use cellular data or other WiFi networks won't be paused. To pause an individual device, simply select the unpaused device and then select  Pause Device . You can either pause the device for a specific amount of time (for example, 30 minutes, one hour or two hours) or indefinitely until you choose to unpause the device. The  Pause   function only pauses WiFi access on your home network and does not impact access to using cellular data, a public Xfinity WiFi hotspot or other available WiFi networks. When attempting to access the Internet on a paused device, the user will see the device's default message that the site cannot be reached or that it is not connected to the Internet. To unpause a device (if the device is individually paused), select the paused device under  Paused   in the  Devices   section, then select  Unpause Device . If the device is assigned to a profile that is paused, select that profile, then select  Unpause All Devices . If the device is paused by Bedtime Mode, select the profile where the device is assigned, then select  Wake Up . This will unpause   all   devices assigned to the profile until the next scheduled bedtime.   **Note**:  If you've previously set up a device block from your Gateway's Admin Tool (http://10.0.0.1), you should see the device listed with a pause icon in xFi indicating WiFi access over your home network is already paused. Once you Pause/Unpause a device or access Bedtime Mode or Port Forwarding through xFi, you will no longer be able to access similar features (block, scheduled block or port forwarding) through the Gateway's Admin Tool (http://10.0.0.1).   People       In the  People  section, you can organize all of your connected devices by the people who use them. Once you've created profiles, you'll be able to access additional features to manage your home network, including the ability to set Parental Controls.   Creating Profiles You can manage devices connected to your home network more efficiently by assigning them to a profile. Create a profile for an individual (e.g., John, Mom) or group (e.g., Kids), then assign their devices to that profile. You can create profiles from the  People  section by selecting  Create Profile , or during the process of naming a device in the  Devices section. After you create a profile, it will appear in the  People  section. For all the devices assigned to that profile, you can view how active they are on your home network, see which devices are online, instantly pause WiFi access, set a bedtime, and enable Parental Controls. For your convenience, in addition to the custom profiles you can create, we've created two profiles to help you get started: Household profile:   This profile is intended for smart home devices used by all family members (e.g., Smart TV, thermostat, security system and door locks). Guest profile:   This profile is intended for visitors' devices that you'd like to keep track of. These profiles will only appear in the   People   section if a device is assigned to them and cannot be deleted.   Pause All Devices You can block a profile or group of devices from accessing the Internet when connected to your home network by selecting  Pause All . You can either pause the devices for a specific amount of time (for example, 30 minutes, one hour or two hours) or indefinitely until you choose to unpause the devices. Once a profile is paused, any new device assigned to that profile will be paused. Please note that any in-progress activity might not stop immediately.  Learn more about pausing a device .     Active Time Alerts An Active Time Alert provides awareness of how long a profile is active on your home network, to help your family promote healthy Internet usage habits. When enabled, the  Xfinity primary user  will be notified when a profile’s devices have been active on the home network for the amount of time you specify. When the active time limit is close to being reached, you will receive a text message, email and/or push notification, depending on your xFi notification preferences. You can then decide if you want to take action and pause the profile’s WiFi access using your home network. The profile will not be automatically paused once the time limit is reached. To set up an Active Time Alert, visit the profile you'd like to set an alert for, select  Edit   next to  Active Time Alert , then choose  Weekdays   or  Weekends   and adjust the bar to set the active time limit. This will be the daily limit for the profile, starting at 12am each day. Be sure you have Network Activity notifications turned on to receive these alerts.  Learn about notification preferences . Activities such as streaming music or videos, surfing, shopping, gaming and downloading books, pictures and videos, count towards "active time." Applications that you may not be actively using, but are running in the background (for example, an app downloading an update) may count towards active time. Access using cellular data, a public Xfinity WiFi hotspot, or other available WiFi networks will not count toward active time. For more information on what counts towards active time see our  xFi Frequently Asked Questions .     Bedtime Mode Bedtime Mode allows you to automatically pause WiFi access over your home network during scheduled times for all devices assigned to a profile. For example, you can pause kids' WiFi access during dinnertime or bedtime. Different schedules can be set for school nights (Sunday - Thursday) and weekends (Friday - Saturday). To set Bedtime Mode, select a profile, then select  Edit  next to  Bedtime Mode . Select the desired nights for Bedtime Mode and the  sleep  and  wake  times for all devices that are assigned to that profile. All devices assigned to that profile will then be paused during the sleep times selected. If you have a single device you'd like to set Bedtime Mode for, first assign it to a profile. Once assigned, select that Profile, and then  Edit   next to  Bedtime Mode . If any device assigned to that profile attempts to access a website, app or service outside a web browser (e.g., mobile email app) during a scheduled Bedtime Mode, the user will see the device’s default message that the website cannot be reached or that it is not connected to the Internet. Note:  If you've previously set up a scheduled block for a device(s) from your Gateway's Admin Tool ( http://10.0.0.1 ), you should be alerted when you attempt to set up Bedtime Mode that your prior settings will be cleared. Once you access Bedtime Mode, Pause/Unpause a device or access Port Forwarding through xFi, you will no longer be able to access similar features (scheduled block, block or port forwarding) through the Gateway's Admin Tool ( http://10.0.0.1 ).     Parental Controls Parental Controls help reduce the risk of children accessing content that is generally deemed inappropriate. To set Parental Controls, you'll need to first create a Profile and assign your child's devices to it. Once created, select that profile, then select  Edit  next to  Parental Controls . Next, select  On  to only allow access to content deemed appropriate for all ages. If you have a single device you'd like to set controls for, first assign it to a profile. Once assigned, select that Profile, then select  Edit   next to  Parental Controls  and choose  On . Content should be blocked fairly quickly once parental controls are enabled; however, content that was already accessed on a device may be cached and, therefore, may still be accessible on that device for up to 24 hours. Parental Controls only restrict access for devices connected to your personal home network. The following third-party settings are applied to profiles that have xFi Parental Controls enabled: Google SafeSearch:   On Bing SafeSearch:   Strict YouTube Restricted Mode:   On When Parental Controls are turned on, these services' protective settings help limit exposure to potentially explicit content for the associated websites as well as the Google and YouTube apps. If a device assigned to that profile attempts to access a website or app known to host inappropriate content for that level, a block page will be displayed. In the case of secure websites or mobile applications, the block page may not be displayed, but access is still prevented.   Home Network Activity In addition to viewing aggregate network activity for all profiles and devices on your home network in the   Overview   section, you can view activity for individual devices and profiles. Simply select a device or profile to view network activity over the past 24 hours and the past 30 days.

  For those of you who have an anti-virus/security program/suite installed on your system, it is important to remove those programs prior to installing NSS.  It is recommended that the programs first be removed via Control Panel > Add/Remove Programs.  Once the program is removed, do a search for a Removal Tool for that program.  Many programs have removal tools available and insure a more thorough removal of the old program and a better chance of a clean install of NSS.   Here is a suggested link to assist with the removal: http://support.kaspersky.com/us/consumer/tools-utilities?_ga=1.54697835.1371605271.1460378651   Insure your Windows Firewall is turned on.   Turn off all your remaining anti-malware tools (except Windows Firewall) and reboot.   The Norton Security Suite,is available only for Comcast High Speed Internet customers.  You can go to the “Get Comcast Norton”  page   http://constantguard.comcast.net/norton?cid=NET_33_601 and confirm each of the prerequisites listed there and the minimum system requirements on subsequent pages. You may be required to logon with a Comcast.net Identifier that you use for Comcast Email or for this Forum before you download.   Please follow the instructions for installation and view the video for more clarification.   Once installation is complete, open NSS and manually Run LiveUpdate (located on drop-down under PC Security left side of main page of NSS) as many times as necessary for it to respond "no more updates available". If a reboot is requested, reboot and then continue to Run LiveUpdate until it responds "no more updates available" and then reboot one last time.  Your installation should now be up to date definition wise and ready for use.   If any problems/questions feel free to start a new thread on the Anti-Virus Software & Internet Security Board and we'll provide assistance.