This problem is caused by the fact that no outside program is able to delete the items in your System Restore folder; manually clear your System Restore folder.

To manually empty the System Restore folder (If you are using Windows Me):

• Close all open programs.
• Right-click “My Computerâ€? on the Windows desktop, and then click “Propertiesâ€?.
• Click the “Performanceâ€? tab.
• Click “File Systemâ€?.
• Click the “Troubleshootingâ€? tab.
• Check “Disable System Restoreâ€?, click “OKâ€?, and then click “Closeâ€?.
• Click “Yesâ€? to restart. This disables the “System Restoreâ€? feature and will purge the contents of the “_RESTOREâ€? folder when the system is restarted.
• After cleaning the infected files, repeat steps 1 through 7, except in step 6, uncheck “Disable System Restoreâ€?.
  
  After the above steps are complete, create a new restore point:
  
• Click “Startâ€?, point to “Programsâ€?, point to “Accessoriesâ€?, point to “System Toolsâ€?, and then click “System Restoreâ€?.
• Click “Create a restore pointâ€?, and then click “Nextâ€?.
• Enter the description of your Restore Point and then click “Nextâ€? to confirm the creation.
• Click â€?OKâ€? or â€?Homeâ€?.
  
  If you are using Windows XP:
  
• Click “Startâ€?, and then right-click “My Computerâ€?.
• Click “Propertiesâ€?.
• Click the “System Restoreâ€? tab.
• Check “Turn off System Restoreâ€?.
• Click “Applyâ€?, and then click “OKâ€?.
• Restart the computer.
• Repeat steps 1 through 6, except in step 4, uncheck “Turn Off System Restoreâ€?.
  
  After the above steps are complete, create a new restore point:
  
• Go to “Startâ€?, then to “All Programsâ€?, then to “Accessoriesâ€?, then to “System Toolsâ€?, then to “System Restoreâ€?.
• On the page that is brought up, you have three choices. Choose “Create Restore Pointâ€? and click “Nextâ€?.
• Click “Create", then “Closeâ€?. A new restore point has been created.