To Flush the infected restore points:
Click Start Menu > All Programs > Accessories > System Tools > SystemRestore
Choose
Create a Restore Point then click
Next. Name it and click
Create, when the confirmation screen shows the restore point has been created click
Close.
Next goto Start Menu > Run > type
cleanmgrClick
OK, Disk Cleanup will open and start calculating the amount of space that can be freed, Once thats finished it will open the Disk Cleanup options screen, click the
More Options tab then click
Clean up on the system restore area and choose
Yes at the confirmation window which will remove all the restore points except the one we just created.
Hope that helps.