This linked Knowledge base article describes how to perform an 'In Place upgrade', which is what you need to do. It reinstalls Windows over the top of itself, and corrects a lot of system corruption issues such as you have.
Catweazle
Grandad
4,335 posts since Mar 2004
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I'm just curious, is it possible spybot caused this? If not, any idea what did?
dlh6213
Posting Maven
3,117 posts since Jul 2004
Reputation Points: 63
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Some of the changes you made with Spybot may have. If you have similar problems in future, run Spybot again and use the 'Recovery' feature to check. The feature reverses the changes you made ;)
Catweazle
Grandad
4,335 posts since Mar 2004
Reputation Points: 229
Solved Threads: 149
When I first started using SpyBot, I read the scan reports before fixing anything, but since then I've just been letting it fix whatever it finds. I guess this isn't a good practice -- better go back to reviewing before fixing so I don't end up with this problem. Thanks for the awareness!
dlh6213
Posting Maven
3,117 posts since Jul 2004
Reputation Points: 63
Solved Threads: 214