The problem is last Antitrack update. Lots and lots of users are having the same problem. Same for me. And AVG people here... are sending instructions via email, instead of posting the solution HERE. It seems to be so secret stuff!!!! LOL And much better if they released another update, fixing this problem once and for all. But they don't ;)
Meanwhile... just: - Uncheck "run antitrack at windows start" on the antitrack options (for not having to do the next 2 steps each time you turn on your computer) - Close antitrack from the system tray - Kill "avgantitrackfilter.exe" proccess in the task manager DONE. You will have your internet connection working perfectly again.
And the MOST IMPORTANT step: DEMAND AVG FOR REFUND, as they sold you a completely crappy software.
@Nancy, the "funny" thing is that AVG/Avast 'developers team' (in my opinion: 'super-retards team', who didn't see this HUGE BUG in their update before releasing the update) have still NOT released a solution for their HUGE FAIL.
We apologize for the inconvenience. We've already reported this bug to our developers team & they're currently working towards fixing it. An update patch/micro fix will be released to fix this issue, which will be automatically installed onto your AVG AntiTrack (AVG AntiTrack should be installed in your device). Meanwhile, your continued patience is very much appreciated. Thank you for understanding in advance!