You can rarely get rid of problems on windows without reformatting. If you really want to fix it and spend a few hours, or even days, and (if you are a smoker like my dad was), buy a few packs. Anyways, all I can suggest is Spybot
I'm a hardware guy... so there may be easier ways to fix windows, but I usually go through one windows installation per every few months or so. I'd like to get a recorder for my computer so I can point out all the windows glitched.
For example, every time I have the iTunes window open and I log off of Steam, the iTunes goes into ceasure mode and starts blinking rapidly for maybe 5 seconds. This bothers me.