C: with your drive letter) in the Command Prompt. This overwrites all free space with random data. Option 2: Third-Party Software (Secure Wipe) For a permanent wipe that meets security standards (like for selling the PC), use specialized tools that boot outside of Windows. Microsoft Community Hub +1 DBAN (Darik's Boot and Nuke) : The industry standard for completely "nuking" a hard drive. You must burn it to a CD or USB, boot from it, and it will overwrite the entire disk multiple times. Eraser : A free tool compatible with Windows XP (SP3) that allows you to securely delete specific files or entire drives by overwriting them with patterns. CCleaner : Includes a "Drive Wiper" utility that can securely overwrite free space or entire non-system drives. Microsoft Community Hub +6 13 sites How to Clear and Wipe a Hard Drive | Dell US Mar 25, 2026 —
If you used DBAN or Linux, the drive will be completely blank. To verify: how to wipe a hard drive windows xp
If the drive is broken or you never want data recovered: C: with your drive letter) in the Command Prompt