![]() ![]() This command may require access to the Windows installation source files when you restart the computer. Scanonce: Scans all protected system files one time when you restart your computer. This command may require access to the Windows installation source files. ![]() Scannow: Scans all protected system files immediately and replaces incorrect versions with correct Microsoft versions. If the cache folder becomes damaged or unusable, you can use the sfc /scannow, the sfc /scanonce, or the sfc /scanboot commands to repair its contents. You must be logged on as an administrator or as a member of the Administrators group to run System File Checker. System File Checker also checks and repopulates the cache folder. If System File Checker discovers that a protected file has been overwritten, it retrieves the correct version of the file from the cache folder ( %Systemroot%\System32\Dllcache) or the Windows installation source files, and then replaces the incorrect file. ![]() System File Checker gives an administrator the ability to scan all protected files to verify their versions. This article describes System File Checker (Sfc.exe), which is a command-line utility used with the Windows File Protection (WFP) feature.Īpplies to: Windows 10 - all editions, Windows Server 2012 R2 Original KB number: 310747 Summary ![]()
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