Repair bad files
You must be logged on as Administrator or as a member of the Administrators group in order to perform this procedure. Disable any anti-virus programs that are running on your computer, including BIOS-level antivirus protection. For more information about how to do this, please refer to the program documentation or contact the manufacturer.
Click Start, and then click Run. In the Open box, type SFC /SCANNOW . You may be prompted to insert the Windows XP installation CD-ROM.
(SFC system file checker, checks all protected system files and can replace an overwritten File.)


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