Whether you want to sell your Windows PC, Mac, or Chromebook or give it a fresh start, you need to wipe it first. Here's how.

To format a hard drive before you start using it in Windows, use the Disk Management utility; on a Mac, use Disk Utility.

The drive letters that you see when you go to My Computer or Windows Explorer in Windows XP are most often associated with disk drives and hard drive partitions. But in some cases when you try to ...