|At this point, I don't care. If that's what you want to do, go ahead & do it. But don't say you weren't warned. You may want to consider adding a 2nd HDD & creating a dual boot, or removing the Win7 drive altogether & replacing it with another drive for 2000. That way you won't have to go thru the Win7 reinstall process if things don't go well with 2000.|
Make sure the boot order in the BIOS is configured correctly. The CD/DVD drive MUST be listed before the hard drive in the boot order. Since you stated your system currently has Win7 on it, I suspect it's a newer system with a SATA hard drive. SATA drives didn't go mainstream until after Win2000 & WinXP were released, so to be able to install either of them, you will have to jump thru a few hoops. I wrote a "how-to" for XP, the same instructions apply for Win2000. But before you do anything, you should download all the necessary drivers for 2000 in advance & either put them on a USB thumbdrive or CD. You will need drivers for the chipset, video, sound, network, plus the SATA/RAID driver.
Here's the how-to:
How-to Install Windows XP to SATA Hard Drive
EDIT: if you have an IDE hard drive, the above how-to is unnecessary. Just boot off the 2000 CD, watch for the prompt to "Press any key to boot from CD", press a key then follow the instructions.