Boot to non existant OS

I am running “ME” on one of my computers, & decided I would install 2000 on the secondary drive, forgetting that the boot would still be on the C drive.

I have since removed the second drive, but every time I start the computer I am given a choice of “ME” or 2000. The only problem is that 2000 isn’t there.

Is there any relatively easy way to get rid of the 2000 boot prompt so I can automatically boot to ME?