This is more than a "format". We use software based on military standards to totally "wipe clean" the Hard Disk Drive. This is useful if you have decided to give away your PC to a family member, friend, or want to donate your old computer to a charity, local group or school, it's important to make sure your computer's hard drive is completely free of data.
Ensure that you don't donate more than you planned. The last thing you want is to pass on a PC with sensitive business information or even personal information such as stored passwords, personal documents, and credit card numbers.