I Did Something Stupid...
 

When I turn on my computer, instead of the loading WIndows XP screen, I get an error:
Grub Loading

Error loading GRUB

Then it doesn't do anything, and I can't start in safe mode.
How do I boot back to WIndows?

If you want to get rid of grub, then throw in your XP disk, boot into a recovery counsle, and then

fixmbr

Done and done.

This will fix the Master boot record so you can boot into windows. If you still want access to Linux, then you have to reinstall grub.

Wow thanks. You have saved my life. I am forever in your debt.