People are under this false impression that they can just go buy a program that will retroactively fix any and all virii and spyware. This is a lot of times impossible. Once a virus or spyware truly infiltrates your system you most likely have to reload Windows and then load antivirus/spyware protection from scratch (like they should have all along). The Windows registry is craptastic, but it exists and as long as it does many virii and spyware will be able to prevent repair software from installing successfully. You can't really expect Symantec to log into your computer remotely and hack your registry enough to install their software and then remove all of the bad stuff for you for free. End users are idiots.