ok, i've had many trojans and removed them all before, but now apparently there is a virus on my computer that adds "http:///?%20" before every url, even when i load up my homepage. I can connect to AIM fine, so i don't know what is going on....because of this problem, i am unable to visit any website. I have used many programs to scan and nothing came up. If this isn't a trojan, what is it?

Well, if this thing is messing with your browser it may not be a virus or trojan. Probably is spyware, so try the appropriate removers/Lavasoft Adaware, Spybot, SpywareBlaster.