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How to use SFC Scannow to repair Windows system files – The sfc scannow option is one of the few explicit switches accessible in sfc order. The command prompt is used to run the system file checker.
Although you can use this direction for many operations, sfc scannow is the most widely used way for sfc orders.
Sfc /scannow will investigate most of the important Windows files on your PC, including Windows DLL files. If System File Checker accidentally finds any problem in these secured files, it will replace it.
Use SFC Scannow to repair Windows system files
Take the following measures to combine sfc with scannow alternative methods to repair important Windows files:
Step 1: Open a command prompt as an executive, often referred to as an “elevated” command prompt.
Note: In order for the sfc /scannow direction to work properly, the command must be executed from the raised command prompt window in Windows 10, Windows 8, Windows 7, and Windows Vista. This is not necessary in the past Windows form.
Step 2: Type the following command and then press Enter:
Note: To use the System File Checker from the command prompt through advanced startup options or system recovery options, please refer to the “Execute SFC /SCANNOW from Outside Windows” section below for some necessary changes to the way commands are executed.
The System File Checker will now verify the integrity of each protected operating system file on the computer. It may take a while to complete.
After the verification process is complete, assuming the problem is found and corrected, you will see something similar to the following in the Command Prompt window:
Windows Resource Protection found corrupt files and successfully repaired them. Details are included in the CBS.Log windirLogsCBSCBS.log. For example C:WindowsLogsCBSCBS.log. Note that logging is currently not supported in offline servicing scenarios.Command Prompt window
…or something like this if no problems were found:
Windows Resource Protection did not find any integrity violations.Command Prompt window
Step 3: If sfc /scannow repaired the file, restart the computer. System File Checker may or may not prompt you to restart, but even if it does not, you should still restart.
Step 4: Repeat any process that caused your original problem to see if sfc /scannow has resolved the problem.
Execute SFC /SCANNOW from outside Windows
When running sfc /scannow from outside of Windows, such as from a Windows installation disc or flash drive, system repair disc or recovery drive at the command prompt available when booting, you must accurately inform the location of the sfc command Windows exists.
sfc /scannow /offbootdir=d: /offwindir=d:windows
The /offbootdir= option specifies the drive letter, while the /offwindir= option specifies the Windows path, again including the drive letter.
Hope to help you !
More: Windows 10 Wi-fi icons have problems? refer to the article How to fix no Wi-Fi icon in Windows 10.