Be careful, folks! I must have downloaded something off the net that looked like it came from microsoft. It is BlockWatcher and is supposed to be good for you - says it will pick up spyware and virus and all - They want you to pay $50 for the privilege of removing bad stuff. It is a scam, pure and simple. And it gets deeply embedded in the computer. It is a mess. You can't uninstall it by any known normal methods.
Spent a lot of Saturday messing with that pesky malware - found a program on line to uninstall BlockWatcher.
Just because something looks legit doesn't mean it is!