I had a problem with a virus that I got on a forum, so I redid my PC with the installation disc. Searched for hours for an answer on Microsoft's website. Couldn't find anything helpful. Did a recent search
on Google and found this info in a forum. Not sure why this was so hard to find an answer to on Microsoft's website. The answer is here. They updated the Windows Update Center, and now you need to download an update first. I'm on a Dell Dimension 3000 PC using
XP. I used the x86 version, and everything worked again.
Here is the link to the Microsoft Support for this: http://support.microsoft.com/kb/943144/en-us