I test drove Linux Mint a while back and uninstalled it, but I’ve always been stuck with the GRUB boot loader that it left behind. After researching, I came up with the following to replace GRUB with the Windows boot loader:

1. Download and install EasyBCD. Don’t worry, it’s free for non-commercial use.
2. Go to the BCD Deployment tab.
3. Select the correct version of the Windows boot loader for your computer (Windows 7/Vista or XP).
4. Click Write MBR.
5. Go to the Edit Boot Menu tab and make sure your Windows installation is listed there correctly.

Reboot, and the GRUB screen should be gone. If you can’t boot into Windows, you probably deleted that boot entry (this happened to me). Try following the instructions here.