: This process can take several hours (roughly one hour per 320 GB) as it overwrites the entire disk.
If you want to wipe the entire computer including the OS: how to wipe hard drive windows 7
diskpart list disk select disk X (X = number of the drive you want to wipe) clean all : This process can take several hours (roughly
This guide covers three methods to wipe a drive, ranging from the built-in Windows tools to third-party solutions for total security. Since Windows 7 lacks a built-in "secure erase"
If you are selling your PC or giving it away, you should perform a "secure erase." This overwrites the data with zeros and ones so it cannot be recovered. Since Windows 7 lacks a built-in "secure erase" command, we recommend a free tool like or Eraser .
This is the standard method if you plan to reinstall Windows 7 on the same computer. It effectively "resets" the computer to factory defaults.
Whether you are selling your old computer, recycling a laptop, or simply want to start fresh with a clean installation of Windows, wiping your hard drive is the best way to ensure your personal data is permanently removed.