[Japo]

I don't understand the concept of asking an OS to uninstall itself; and why would you use an AOL/OEM mongrel setup utility? Never mind it. Just wipe the hard disk. Then you can always install another OS.

The first step, as Dosraider says--but it needn't be complicated--is to boot from a different disk than your hard disk. You can do that with any kind of bootable CD or USB, including many OS installation disks which are most times bootable. To boot from another drive than the hard disk, you'll have to press a certain key during BIOS boot as instructed on screen, or at most temporarily reconfigure the boot sequence in the BIOS.