Honestly I'd go for "Hijackthis" and scan the PC properly. It takes few seconds. Have a google. For "start regedit.com", if you'r talking about the CMD console, I don't seem to understand what you'r trying to do. Go for the problem-exe and kill it. I have a problem with Hijack This. I open it and it keeps saying "Hijack This is already running", but I don't see it running.