Cant uninstall xp pro keeps looping

I tried to uninstall Windows XP Professional but it wont let me. Keeps going to a screen that tells me to insert the Windows XP Profesional service pack 2 disc but i dont have it anymore. I just want to install a different operating system but it wont go anywhere else other than to the “setup is being restarted” screen and goes through the whole thing again. I tried setting it to boot from a cd but it still goes to the same thing. Please help

You set to boot from CD? What CD? You can’t “uninstall” if XP is on the disk you are booting from. If you have another OS CD/DVD, boot from it and you should be able to do a fresh install of whatever OS you have overwriting your XP installation.