How To Replace System Files

less than 1 minute read


If you ever need to replace system files in Windows, follow these steps.

To Resolve:

  1. Run CMD as administrator by Search – cmd – right click on the cmd icon – Run As Administrator.
takeown /f C:\Windows\System32\filename.dll
  1. Now replace the file with a copy you got.

  2. Now type:

cacls C:\Windows\System32\filename.dll /G (UserProfileName):F
  1. That command gives you permission to access the file. Press “Y” to take ownership of the file.

In a script you would use the following to take control of a file and delete it:

takeown /f "%windir%\System32\filename.extension" /r /d y
icacls "%windir%\System32\filename.extension" /grant administrators:F /t
rd /s /q "%windir%\System32\filename.extension"