A: You are trying to format the drive Windows is currently using. You must boot from external media (Method 2).
Have a Windows 7 formatting horror story or success? Drop a comment below. format windows 7 hard drive
How to Format a Windows 7 Hard Drive: A Step-by-Step Guide (Before You Recycle or Reinstall) A: You are trying to format the drive
If you are doing this because Windows 7 is running slow, try the "Custom install" method. A fresh format is like a time machine for your PC. format windows 7 hard drive
If you are selling the computer, do not just format. Use DBAN or physically destroy the drive. Your privacy is worth the extra hour.