Windows XP Pro Complete Shutdown

My brother's friend was trying to add a MAC Program to our Microsoft Windows XP Professional and it rebooted my computer. It starts up okay, but once it starts up Windows XP, it goes to jibberish and you can't read it. It asks for a disk in that jibberish and we think that that it is some kind of Compact Disk. When we put that in, it procedes through a load and then it gets stuck around 3/4th of the way. Then it just rebooted and asked for it to do again. It probably is because some files have been corrupted.

Is there any possible way to fix this? Please, if you can help solve this problem, please do.

EDIT: The jibberish is gone now that my dad took out the seta drive. (K Drive...K for Kirby)

So is your problem fixed now that the Sata drive is taken out?
I am kinda confused. Were you trying to reinstall the OS and it wouldnt let you?

You might need to delete that partitions

Were can u uninstall stuffint eh BIOS??

Just delete partitions and reformat
Unless you have important stuff, then try to back up.

Oh, and a lot of programs work for both Mac and Win, so the friend prolly thought it would work

MAC = Media Access Control
Mac = Apple Macintosh