This was posted by Essexboy, but your original post was 'hijacked' in dealing with another similar problem. Follow up his advice here, and post a reply:
A question. Does the system restore have a series of restore points on it ?
If yes then
Please download
Deckard's System Scanner (DSS) and save it to your Desktop.
- Close all other windows before proceeding.
- Double-click on dss.exe and follow the prompts.
- When it has finished, dss will open two Notepads main.txt and extra.txt -- please copy (CTRL+A and then CTRL+C) and paste (CTRL+V) the contents of main.txt and extra.txt in your next reply.