Suspicious Activity

It would help if you could provide more information about the 'suspicious activity'; what exactly was happening, and what was the verbiage of the message(s) you received?  It might have been as innocuous as your phone doing a system update, or perhaps it was backing up contents of the device, and because of the sudden spike in traffic it triggered an alert.  It is also possible that you do have malware on your phone (The google Play store is full of malicious apps).  Norton is among the very best security available, and will pick up on things that other less sophisticated security apps will miss.  xfinity used to offer Norton, but then decided it was 'too expensive'; what they offer now as 'security' is a pale shadow of what they offered when they had Norton. 

Please provide more details. 

Strange.  There was a couple photos with this post, but the bot ate them.  Not sure what the issue was, they were edited for content by the user.

When it was there, it appears it was just complaining about "Weak WiFi Password".  That usually means you are using a wifi password all in upper or all lower case, no numbers or special characters or dictionary word based password.

If you do that, some utilities/virus programs will nag you about it and it's bad practice in general.  Doesn't mean there's really anything specifically wrong.  But still, change your WiFi password, make it harder to crack.  Use upper/lower case.  Toss some numbers in there.  Maybe a special character somewhere in the middle. 

Your response has bee removed;; I assume there was some type of personal information in the screen shots you provided.  I didn't have a chance to look closely at them before they were taken down, but they indicated that your network credentials were weak.  The 'error' you see may also be due to having tethering enabled on your phone; When you are not using it, tethering should always be disabled.  I would first try turning off tethering on your phone, and then changing your network credentials to something that is unpronounceable.  Suggest you use a password manager; you only have to remember one password, and it will handle all login tasks for you, including generating secure passwords.  There are many out there; I use LastPass, which in my humble opinion is best, but look around and see if you can find one that you like. 

All.

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Changing your password will not hurt, other than you have to login in with the new credentials on all of your devices.  I think that the message is related to your phone being in tethering mode, and it could mean that you have a weak password on that network.  If I were you, I would disable tethering when not in use, and change passwords on both.  If your phone is/was not in tethering mode, then I am uncertain of the source.  Norton says that no action is required.  As an experiment, would you be willing to turn your phone off completely and see if the message goes away?  It is possible that you have malware on your phone; some types of malware can cause your phone to enable tethering as a means of tracking and connecting to your phone without your knowledge. If the message disappears when you turn off your phone, then you will know the issue is with the phone.  If that is the case, you have a couple of options; scan your phone with a good antivirus program (Norton has an app that is included with many of their security suites).  I would make sure that tethering is turned off, and would check the phone several times a day to see if it re-enables it; that would be indicative of either malware or a legitimate app doing that, and you will have to figure out what causes it if that happens. The last option, the one that I would use, is to do a complete backup to your computer, to include both internal storage and the microSD card if one is installed. Once the backup is done, scan the folder with the antivirus on your computer.  Then do a hard reset on the phone...a complete factory reset.  Do not restore form the online backup if you have that enabled; back up from the image that you stored on your computer.  If ll goes well, delete all remote backups stored on your cell phone provider's servers, then do a fresh backup to the cloud. 

Please let us know how it goes. 

Without more to go on, I cannot make a guess as to what triggered it.  If you no longer see new warnings, then I would not worry about it.  If it does occur again, you can open Task Manager and go to the Performance tab as see what the processor and the internet tabs are doing.  If you see a lot of activity and you are not doing anything (i.e. not on the web, not streaming, etc), then I would start to get very concerned.  This event could have just been an anomaly.  Keep an eye on things, and if you get new warnings, please post back. 

You should be safe.  The notice means that Norton protected your network, then alerted you to the problem it found.  If Norton had needed you to do something on your end, it would have told you what steps to take.  

Easy to test.  Change your WiFi password back to what it was before, then see if Norton nags you about "Weak Password" again.

Update⚠️

@flatlander3 , @NoNoBadPuppy 

So here's the update. I just ran into that error again. My wifi got disconnected for suspicious activity as seen in picture 1 And 2nd picture is for my mobile hotsport and 3rd picture is detailed view of my hotspot. I did run an antivirus scan right away when I got disconnected from wifi and connected my Hotspot. I don't why it happened again. Nothing comes up on antivirus bitdefender, avast, Norton security. Everything was virus free in scans. Is there anything I can do now?

Thank you.

It is really hard to say what is causing the notification, other than there appears to be an unsecured wifi connection on your phone. If it were me at this point, I would do a factory rest of the phone and not restore it from a backup.  By that I mean that you should back up all the data on you phone, factory reset it, and then treat it as a brand new phone and install everything manually; do not use a backup to restore from in case there is malware that is causing it.  I would keep careful notes about each step; if you do the above and the notification returns, perhaps you could arrange for an RMA and get a replacement phone.