How to Use System File Checker (SFC) to Repair DLL and System Files in Windows

The System File Checker (SFC) is a powerful tool built into Microsoft Windows that helps detect and repair corrupted or missing system files, including essential DLL files. This guide will show you how to use SFC to maintain system stability and resolve errors effectively.

Open the Command Prompt

Open the command prompt as an Administrator.

Open Command Prompt as Administrator to use the System File Checker (SFC).
- Scan Only
  
  Use the following command to verify the integrity of system files without making any changes:
  
  C:\User\Username>sfc /verifyonly
- Scan and Fix Errors
  
  To scan and automatically repair corrupted system files, use the following command:
  
  C:\User\Username>sfc /scannow
- Purge Cache and Scan Integrity
  
  To clear the Windows File Protection cache and scan system files, use this command:
  
  C:\User\Username>sfc /purgecache
- Revert SFC Changes
  
  If you need to undo changes made by the SFC tool, use the following command:
  
  C:\User\Username>sfc /revert

Open the Command Prompt

Scan Only

Scan and Fix Errors

Purge Cache and Scan Integrity

Revert SFC Changes