This article explains how to use a System Repair Disc to format your C drive from Command Prompt. It also covers how to format C drive without a System Repair Disc. The information in this article applies to Windows 11, Windows 10, Windows 8, and Windows 7.

You will need access to a working Windows computer with an optical disc drive to create a System Repair Disc. Follow these steps to format your C drive:

Insert a blank CD or DVD into the disc drive of a working Windows PC.

Open the command prompt and run the recdisc command.