The easiest way to delete everything on your Windows Vista hard drive is to use the formatting tool on the Windows Vista installation disk. You cannot format a drive while it is being used by the operating system, so if you are looking to format your Windows Vista drive this is the only format method that you are able to use. The format wipes all data off of the drive and writes a new file system to the disk. Writer Bio

How to Delete Everything on a Computer on Windows Vista  6 Steps  - 89