1. Insert Window XP CD-Rom
2. Reboot computer
3. After the computer restarts, the message "Press any key to boot from CD" appears. Press any key.
4. Choose to install Windows XP and follow the instructions
5. It will ask you if you wish to format the computer to reinstall as it detects that there is already a Windows installed in the computer. Click yes
6. Then it will ask if you want to 重新劃分磁區, choose the drive and type the size of the drive
7. Choose the drive for installing Windows
8. Just wait and follow the instructions