Windows cannot find ‘C:\Windows\System32\rundll32.exe’

Problem

You keep seeing the following error message appear:
“Windows cannot find ‘C:\Windows\System32\rundll32.exe’. Make sure you typed the name correctly, and then try again.”

Solution

1. Open a Command Prompt as Admin.
2. Type the following into the window and press Enter:
   sfc /scannow

Wait for the process to complete and the file should be restored.