Get BHO Demon and WinPatrol as well. They run in the background and keep watch for odd things happening (to put it in a very technical way). And don't pay any money for anti-spyware stuff. Some of the paid-for spyware removers do a very good job of removing other people's spyware and them put their own in. Or on a 'free trial' they find all sorts of stuff that's not there so that you will pay for their software which will successfully 'remove' it. Stick to LavaSoft AdAware, SpyBot Search & Destroy and the other two I've mentioned. Send them a donation if you can, but they don't insist on it.