Preep,

I'm not saying get rid of AV, just to test the problem.. geez I won't recommend running with out AV protection..
Your comments are correct.. But most times when repairing ppls machines, Uninstall/reinstall is all that is needed.. most times reg hacks are not needed.. but to check a few common prob areas is a good idea. I hope I don't sound like I have come back with a flame thrower?

Back to the problem,
Also some crap installers have damaged Win system files, leaving ppl with knackered systems, even a warm install won't help.. system file checker may help..
Winsock, this can become corrupted after software install, even from a dubious script on a web page, some times deleting the registry link and restarting, sometimes system file checker and replacing the file.

Cheers