I'd be curious to see a solution too, since it's been plaguing me as well. Though in my case it's specific to SWTOR. Internet and all other programs I run would work fine, but every hour, like clockwork, there's a server disconnect. Only stopped when I uninstalled Avast.
Tried making sure I was running the most current version (I was) and adding the program's executable file to the exception list, still happened.