Method one:
Insert the system installation CD and run the sfc /scannow command to detect and repair system files that may be damaged and changed.
This will not happen again
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Method 2:
Run gpedit.msc to open the group Strategy,
and then expand to Computer Configuration - Administrative Templates - System - Windows File Protection
Find "Set File Protection". Double click and change to "Disabled"Restart the system and get it
SFC/SCANNOW Scan all protected system files immediately.
SFC/SCANONCE Scans all protected system files once.
SFC/SCANBOOT Scans all protected system files every time it starts up.
SFC/CANCEL Cancels the scanning of all suspended protected system files.
SFC/QUIET replaces all incorrect file versions without prompting the user.
SFC/ENABLE Enable Windows File Protection for normal operation
SFC/PURGECACHE Clears the file cache and immediately scans all protected system files.
SFC/CACHESIZE=x Set file cache size
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