Ok.Now Add the two lines in your WebShield.ini
[General]
UseStreamFilter=0
It is located in C:\ProgramData\AVAST Software\Avast\WebShield.ini Vista, win7 or later - this ProgramData location may be hidden.
You should only use notepad to edit this and you should run notepad.exe as administrator in win7 or higher.
What game do you play?