First, insert a bootable XP cd in your hard drive. Then the setup will start. Press "enter" to setup XP and then press F8 to accept the agreement. After that, press "enter" to setup Windows XP on unpartitioned space. After this press "Format using the NTFS file system". Then a new window will appear which will start the formatting process which will take several minutes depending upon the ram on the computer. This will help you quickstart your new PC on your own.