1. Click the Start button and then click Run.
   The Run window appears.
2. Type msconfig in the text box. (Figure 1)
3. Click the OK button.
   The System Configuration Utility window appears.
4. In the General tab, click to select Selective Startup.
5. Click to uncheck Process System.INI File.
6. Click to uncheck Process Win.INI File.
7. Click to uncheck Load Startup Items.
8. Click the Services tab.
9. Make sure that Hide All Microsoft services is not checked.
10. Click the Disable All button.
11. In the Service list scroll through and click to select System Restore Service and Plug and Play.
12. Click the OK button.
    After a few moments a System Configuration message appears.
13. Click the Restart button for the changes to take effect.
    A System Configuration Utility message appears after the computer finishes restarting.
14. Click the OK button.

If this does not work, i would definetly back up and reinstall.