I think we could spend our life to speculate but if the OP can't fix it then please supply the output of
Also has the Bios been enabled to protect the boot sector making it impossible to alter?

The command "fixmbr" just install MS's MBR into the first sector of the first boot disk. MS MBR's mission in life is to search the 4 primary partitions and boot the one that has the bootable flag switched on.

Hey guys, thanks a lot for keeping me updated on this. I haven't had a chance to fix my computer yet because I had to pull some all-nighters to get my work done. It seems as though it shouldn't take that long, but my Linux experience has often led me to spend too much time trying to get things to work. It's an educational process, but one that I don't have time for right now, especially as I have have midterms next week.

Duryodhan, sorry if this is a stupid question, but how do I switch bootable flags off? Do I just run "cfdisk" or something similar? Because "cfdisk" sometimes complains that it can't write to a partition.

man fdisk.

rather run fdisk on the disk and press m for help. I think it is 'a' that does it, but I don't remember.