Let me suggest that you check your smartphone if you have one and under settings, see if you have a "setting up a hot spot " should be in tethering menu, or close by for Android phones. Even though switch may be switched to "off" , hackers seem to have found a way to set up hot spot and infiltrate router. Both my husband's and I phones have been affected. They name phone, set up new password for them to access router and it is impossible to erase. Or cancel. I found out because Wifi kept disconnecting on phone. Just got new router and this program which shows other devices and no less than 20 devices that are not ours. If anyone remembers , FBI warned public and COMCAST about this months ago.
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