[PC] How to Run the Windows System File Checker

The Windows System File Checker will replace any corrupted Microsoft DLLs with the appropriate versions.

If you are running Windows 10, Windows 8.1 or Windows 8, run the Deployment Image Servicing and Management (DISM) tool using the instructions below prior to running the System File Checker.

Windows 10, 8.1, or 8

1. Launch the 'Command Prompt' as an administrator
2. If prompted for an administrator password or confirmation, enter the password or select 'Allow'
3. Enter the command:
   DISM.exe /Online /Cleanup-image /Restorehealth
4. Once complete, enter the command:
   sfc /scannow
5. Allow the scan to complete, then restart your PC

Important: When you run the /Restorehealth command, DISM uses Windows Update to provide the files that are required to fix corruptions. However, if your Windows Update client is already broken, use a running Windows installation as the repair source, or use a Windows side-by-side directory from a network share or removable media, such as the Windows DVD, as the source. To do this, run the command below instead:

Note: Replace the C:\RepairSource\Windows placeholder with the location of your repair source. For more information about using the DISM tool to repair Windows, reference: https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-8.1-and-8/hh824869(v=win.10)?

Windows 7

1. Launch the 'Command Prompt' as an administrator
2. If prompted for an administrator password or confirmation, enter the password or select 'Allow'
3. Enter the command:
   sfc /scannow
4. Restart your PC once complete