Fortunately, Command Prompt makes this process simple. I open the utility and type sfc /scannow, which scans for corrupted or missing files and attempts to fix them automatically.

However, the Command Prompt is a lesser-known way to clean your computer. Here are a few ways to clean up a slow Windows computer using Command Prompt.

The reasons can be as follows: Repairing is the most common reason to have the Command Prompt window on the boot screen or login Screen. You can repair Windows using simple commands in CMD.