multiple os list in bios

A while back, I had to reinstall my copy of xp home edition since I had a really nasty spyware infection that destroyed my system registry files. First, I tried installing a fresh copy on my backup drive, but that did not work since I was unable to delete the original copy on the original drive w/o erasing everything else. So finally, I created a new partition for the primary hard drive. I also deleted the copy of xp on the back up drive. Everything has been just fine in terms of performance. However, whenever I start up the computer, it takes me to this page that asks me which copy of windows xp home edition I would like to start up. The first copy is the one that works just fine (starts up automatically after 30 second countdown is over). However, the second one is the one that was already deleted. When I try to select that one, some weird message pops up saying that the computer could not start up with that copy of the os since it does not exist. Both hard drives had been erased, so it can't be anything on the hard drives. I'm guessing that the list of operating systems comes up in the bios. How do I get rid of that list that asks me what os I want to start up in? Has anyone else had a similar problem in the past? If so, please help!

Thanks, the list is gone now.