Help Fully Uninstalling Second Windows Install??

OK... so... originally I had a partitioned hard drive. And then I must have downloaded something from the web which froze my operating system (windows 2000Pro). So... I decided to (probably because I didn't know wtf I was doing) install another copy of Windows 2000 on the other part of the partitioned harddrive (so I could boot from that and go onto the internet to get some anti-virus software).

Anyhow... none of that worked. So I went ahead and did a fresh install of windows and removed everything on my harddrive, including the partitions.

Now, when I'm logged into Windows... I only have one operating system, and everything is working fine. BUT, WHILE I am logging into Windows, it is still asking me to chose between two Windows 2000 operating systems.

Is there any way to get rid of the second choice during startup? Is there anything else I should do?

Help?

Thanks!