Was google.com your homepage prior to the redirecting.
You can try two programs (CoolWebShredder and HijackThis) in the link below to possibly rid of your problem. Try CoolWebShredder first, then HijackThis)
http://www.spywareinfo.com/~merijn/
HijackThis
A general homepage hijackers detector and remover. Initially based on the article Hijacked!, but expanded with almost a dozen other checks against hijacker tricks. It is continually updated to detect and remove new hijacks. It does not target specific programs/URLs, just the methods used by hijackers to force you onto their sites. As a result, false positives are imminent and unless you are sure what you're doing, you should always consult with knowledgable folks (e.g. the forums) before deleting anything.
Currently at version 1.96
CoolWebShredder
A small utility for removing CoolWebSearch (aka CoolWwwSearch, YouFindAll, White-Pages.ws and a dozen other names). Spybot S&D tends to forget essential parts of the hijack, so until it updates, you can just this to completely remove the hijack. Updated to remove the new variants once they come out.
Currently at version 1.12