If you try to format the C drive through File Explorer while logged into Windows, you will receive an error message: "You cannot format this volume. It contains the version of Windows that you are using."
Format disk C:? (Y/N)
His thumb twitched.
By following these guidelines and taking the necessary precautions, you can safely format Disk C and start fresh with a clean slate. format disk c
If your computer won't boot or you want a truly blank slate, use a bootable USB drive. If you try to format the C drive