Adware/Virus problem?

[938]

i've got this virus that changes my home page to some site called; "http://search.conduit.com/"
(it is basicly a rip off of Google.)

i have Explorer, chrome and firefox (it comes up on all of them!)

i have tried to change it by changing the homepage setings, running the nortan Anti virus, and even uninstalling my browsers!

so in other words... HELP!

Thanks for reading!
@Dan

I've tried that, but no such program exists...
@Harry

tried it, already, it just doesn't seem to want to leave >:8