people people..... before you simply throw out "spybot" or "adaware" you should at least take the time to see what the problem is. There are plenty of things that those cant fix.
my favorite post is "download hijack this"
hijack this does NOTHING to fix anything...and unless you are good at fooling around in the registry it is useless---unless you want a 10lb paperweight
Hijack This should be set to SCAN only. It lets you look in the bowels of Windows to see what's running and then post the results in one of the anti-spyware forums. The experts there can help return your computer to normal. However, once you get it back, the best piece of anti-intrusion software I've tried is Pvix's Qwik Fix Pro. It will lock down Windows by turning off unneeded services and patching dangerous exploits used by virus and trojan writers and malware pushers. Check it out. http://www.pivx.com