Buzzzz, look in your Control Panel. Do you have "Security Center" and/or "Windows Security Center" listed? "Windows Security Center" is a fake!
Try the stuff recommended by Jr, but if you still have problems then I'd suggest you try one of the Tech forums who can take you through a clean-up process stage by stage.
... but I warn you it's hard work. You may be better off with a personal 'puter guy, if you've got one. _________________ “Why can’t they invent some software that makes people fuck off?”