SFC usage parameters in Win2000/XP

The startup method of SFC in Win2000 is very special. You must first enter Virtual DOS (run cmd) before entering SFC as a parameter. Otherwise, it cannot run. The specific format of SFC is:

SFC [/scannow] [/scanonce] [/scanboot] [/cancel] [/enable] [/purgecache] [/cache size = x] [/quiet]

Parameters mean:

Use the bold parameters with caution.

/Scannow scan all protected system files immediately
/Scanonce scan all protected system files once
/Scanboot scans all protected system files at each startup
/Cancel scanning of all suspended protected system files
/Enable Windows File Protection for normal operations
/Purgecache clears the File Cache and immediately scans all protected system files (this can only be used when it is determined that the system is not faulty, because the system cache will be lost once it is used, it is troublesome to restore system files)
/Cachesize = x unit: MB sets the File Cache size (please arrange according to the hard disk space)
/Quiet replace all incorrect file versions without prompting the user (Be careful when using this parameter, because using incorrect system files can easily paralyze the system)