2 OS choice come up ?!?

Hi Guys

After hours of playing around with my PC. I have got it 2 work with Windows 2000.

However, when the PC boots up after BIOS stuff

it says
“Please select the OS to start”

1) Windows 2000
2) Windows XP Professional OS.

From my understanding there is no XP setup on my HDD and even when I choose the 2nd option it still boots up in the Win2000.

How do I get rid of that screen prompting on the startup of windows?? and how can I ensure that there is no XP on the hard drive and only Win 2000

Thanks
Andrew