hey,
basically, you just backup your pc onto eathier a DVD, CD, or external harddrive
external harddrive is the quickest and most efficient way of backing up :)
but basically im not completely sure because i have not yet had to restore my computer.
but i think that you turn on the computer and when the bios starts just press f8 and it will take you to the options, then you can access the backup file from the dvd drive or harddrive and it will automaticaly reinstall the files for you :)
post back for any more questions :)