Repair damaged Windows system files

The Windows operating system is made up of tens of thousands of different files, all of which are necessary for its proper functioning. Occasionally, some of these files may be damaged, for example by a faulty hard disk, a power failure, a computer crash, malicious software or other causes. The effects of such damage can lead to general system instability or blocking of third-party software calling on these files.

If you suspect that your PC is affected by such problems, you can check and repair it like this:

Start the command prompt (CMD) in Administrator mode and enter the following command:

DISM.exe /Online /Cleanup-image /Restorehealth

When the command is run, a Windows reference image is downloaded via the Internet, which may take a few minutes.

Enter then the following command :

sfc /scannow

The program will compare the reference image with the files installed on the disk. If a difference is found, the file will be replaced by its equivalent from the reference image.

This operation may also take a few minutes.

You will find further explanation about this operation on the Microsoft Support web site.