Format C Drive Jun 2026

Before you do anything, you must back up your data. Formatting wipes the drive clean.

If you are using a bootable USB drive to install Windows, the setup process handles the formatting for you. format c drive

Enter your product key, or click "I don't have a product key" (Windows will auto-activate later if it was previously activated on this PC). Before you do anything, you must back up your data

Warning: Using Diskpart is powerful but risky. If you select the wrong volume, you will erase data on the wrong drive. Before you do anything