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You have a Windows Vista-based or Windows XP-based computer that has Windows Disk Protection enabled. However, you cannot restart the computer after you use System Restore to restore the system to a point that was created before Windows Disk Protection was turned on. In this case, you have to reinstall the operating system.
This problem may occur when System Restore is set to a time before Windows Disk Protection was turned on and Windows Disk Protection is set to the Retain All Changes Temporarily option.
To prevent this problem, turn off Windows Disk Protection before you perform a system restore. To do this, follow these steps:
Log on to the computer by using an account that has Windows SteadyState administrator permissions.
In the Windows SteadyState dialog box, under Global Computer Settings, click Protect the Hard Disk.
In the Protect the Hard Disk dialog box, select Off, and then click OK.
Restart the computer.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information, visit the following Microsoft Web site: