This video demonstrates how to reformat a hard drive and perform a clean installation of Windows XP operating system. The tutor first advises to make a back up of everything, including the drivers and my folders. He explains various methods by which one can take the backup of the data in a system. Now he shows how to format the C drive where you can now install Windows. He also shows software that is used to take the backup of important data before formatting. This video shows how to reformat and reinstall Windows XP and retain the original data by using the back-up features.