Try this. Log in as some other user and see if it works there.
While I'm sure this is some error in some PATH or other setting, I can't find an exact cure at the moment. Can you share what happened and WHY you didn't use system restore to before this error?
I have XP Home, and I can not open any of the category in the control panel......
All I get is this box, popping up.
Application not found
So what do I do?........TY