actually, it's www.lavasoftusa.com but here's a direct link to Ad-Aware 6
http://www.sz.terra.cl/lava/aaw6.exe

What you have is probably NOT a virus. But spy/ad-ware. It's not a virus, because a virus (by definition) is any program that replicated itself. What you have probably is not copying itself, it's probably just showing you ads.

Get ad-aware 6 and scan your pc. reboot and scan again. Remove ANYTHING it finds too.