If you are attempting to run Windows 7 in a virtual machine, do not install Virtual Machine Additions or you will get to find out what the Windows 7 System Restore Utility can do for you. At least do not install virtual machine additions until you update your virtual machine additions appropriately. If you are running Virtual Server like I am, this mean you just need to update your Microsoft Virtual Server R2 SP1 to the Virtual Server R2 SP1 Update. Then try installing the virtual machine additions ......