Yep, you were right about it being a software conflict, techie. I seems that Avast doesn't like working together with Webwasher - an ad-filtering software that I use. If I disable Webwasher, Avast works fine..
So problem solved, Thanks!
/Fitz
Fitz, if you have trouble with ad-filtering, why don´t you try Ad-aware Lavasoft, SpywareBlaster, SpyBot and SpyGuard (links here)
A small correction to that suggestion: these listed programs (AdAware, SpyBot, etc) do NOT do ad-filtering, they don't remove Ad banners, pop-ups, Flash animation and stuff like this
The best software for ad-filtering (small, has more configurable options than any other similar program) is AdMuncher, available here:
http://www.admuncher.comYea, it's not free, but it works better than most of the Ad-removing programs I have tried and gives me configurable options which other programs don't provide, and it's small, and it appears to work with Avast and many other programs without any problems.