This problem has been occuring for about the last 5 days. My internet is acting up in a way I haven't ever seen before. My Steam chat connection and Skype chat connection work fine, but everything else has a very spotty connection. The connection for these applications will stop working for as long as a half hour, start working again sometimes only for a few minute, and drop out again. This process repeats over and over without stopping.
I am running 64 bit Windows 8 on a laptop. I have ran Malwarebytes and Avast, both scans came up clean. Rkill didn't terminate any processes, services, or find anything suspicious other than Windows Defender being disabled, which happened because I installed Avast apparently. I have tried Chrome, Firefox and Internet Explorer, all have the same problem. When the internet is down for everything else, I can still make Skype calls/chats and Steam chats, but the Steam server browser reports all severs down, and I cannot connect to the Steam Cloud. I have tried clearing my browser cache, restarting my computer, restarting my router, and reconnecting to the wireless network. None of the processes running on my machine seem suspicious. I don't know if this is a virus, but I can't see how it would be anything else. All of my virus scanners and applications are up to date.
Please help as soon as you can, this is terribly annoying for me!