Most (all?) versions of Windows 2000 are bootable CDs, set your BIOS to seek the CDROM on boot, and put the win2k disk in. Reboot, and it should go right to the setup program. If your CDROM doesn't support bootable CD's (not likly), you'll have to go to the Bootdisk directory on the CD and run Makedisk.exe to make bootable floppys.