How can I remove Ubuntu from my system and install the Windows bootloader?

I want to completely remove Ubuntu from my system. But if I delete the partition, the Grub files will be deleted and that will leave me "Bootloader-less". How can I workaround this?

This is the simpliest method I can think of:

1. Boot to Windows;
2. Download mbrfix from http://download.cnet.com/MbrFix/3000-2094_4-10485990.html;
3. Extract the package and copy mbrfix.exe to your favorite directory;
4. Open a command prompt as an administrator, navigate to your favorite directory (cd);
5. Enter the command: mbrfix /drive 0 fixmbr and confirm.
6. Reboot.

Now the Windows bootloader is back. You can mess up the Ubuntu partition at will.

You can either boot into Windows (you seem to have an existing installation) and install EasyBCD (free for non-commercial use) to fix the bootloader, or boot with the Windows install disc, which gives you an option to repair the bootloader as well.