tdsskiller.exe to the rescue
Download "tdsskiller.exe" from Kapersky. It's free and clears up your problem.
I also have Avast, Threatfire and Glary but I don't think they are the cause.
My OS is Vista on a Dell Inspiron 6400 and I also have no intention of wasting money on Win 7. I don't think the problem arose with my OLD desktop with Win XP.
Hope this clears up your backlog.