I have a dual boot setup with Ubuntu and Windows 7, I generally use Ubuntu but some times start Windows 7. Every time I have used Windows 7 my GRUB2 installation brakes and as soon as GRUB2 is launched the computer reboots and keeps doing this forever.
I then need to boot with live CD, chroot and reinstall GRUB2. This takes a lot of time is really annoying.
Obviously something in windows itself or some application in windows rewrites a part of the MBR. I can't understand that this is not considered a big security issue in windows since it completely takes out the computer so that none of the OS can boot.
Can I in some way write-protect the MBR in windows? Is there any type of software built in to windows or some anti-virus or similar that can do this?
Regardless of which application in windows that brakes the MBR there must be a general way of denying this applications write permissions to the MBR.