HOW TO: Recover Windows MBR using Ubuntu LIVE CD
Tested on Ubuntu 7.04; Ubuntu 7.10 and Linux Mint 4.0 Live CDs
If want to restore Windows Bootloader and for some reason cannot use the windows installation cd, there is a simple way to do it:
NOTE: make sure you have internet working.
1) Boot with Ubuntu Live CD or Linux Mint Live CD
2) On the terminal:
sudo apt-get install ms-sys
ms-sys --mbr /dev/hdX
NOTE: in my case the main windows xp system is located in hda1 so I used ms-sys --mbr /dev/hda
This should get your windows back.