To complete bradley90 tutorial i must add: 1.Backup all your important data using a software that is able to store your backup online ( a good example is : http://forums.xisto.com/no_longer_exists/ ) 2. Make Sure you have your Windows XP CD at hand (We need this to re-install Windows!) 3. Restart your PC and press 'DEL' or 'insert' or even 'f2' you will see on the start that :Press "?" to enter setup or bios when prompted. 4. Change the boot sequence to boot from your CD drive first, in case you don't have an boot menu at the start of your computer usssualy it was on f2. 5. Save settings. 6. Insert the Windows XP disc into the CD drive. 7. Restart the PC. 8. Press any key to boot from CD upon being prompted. 9. Some Files will load. 10. When it asks you if you want to install Windows, push Enter. 11. Read the License Agreement and press F8 when finished. 12. Now choose the partition to install to (Install to the partition Windows is currently on!) or you can also delete the partition and make any other new partition you will need. 13. Select NTFS format procedure or Fat32 . 14. Setup will continue and eventually restart the computer. 15. When restarted do not boot from the disc. 16. Follow the on screen instructions... 17. After all is installed you should download you backup data and recover it . 18. Install all your drivers from cd or search your motherboard on google and you will find them 19. And you are done