IN addition, since Avast 4.8 now includes an antispyware component, you probably should disable any other "realtime" antispyware programs.. I believe Windows Defender is also running realtime and you may want to disable it when Avast is installed.
You might even try to uninstall Avast temporarily...
Tried temporarily disabling your firewall?
And finally, is the machine infected? Such could be causing all of your issues.
Hope this helps.
I can't get online with my main machine. Firefox just hangs, "Loading..." rather than returning an error and IE is "Connecting" - says "website found, waiting for reply". I ran CCleaner, Adaware, and now Avast. Avast has been "Testing operating memory and startup items..." for 2 hours. What's going on?
I'm trying to run Avast 4.8 Home on a Vista machine.
I'm online now with another XP machine on the same network .