Letter 'a' went over my head; but, I thank you for ALL of the information, nonetheless.
In other words...
Most PCs have either the restore dvd or a partition (a division of a hard disk) which stores all you need to restore the PC to it's state that you had it when you first turn your PC on for the first time. If you have either one, you can use it but you have to backup all your important info cause if you don't you lose it in the restoration process (cause it will erase your hard drive before putting back XP, your drivers like sound card and network card etc.)