Today i had a crash on one of my machines in work.
Xubuntu just kept crashing, grub became or something as all i got was the grub rescue> prompt.
I could boot a live enviroment off a flash drive, but the installer was corrupt on it so i couldnt get grub reinstalled.
So i couldnt boot windows and i couldnt get into xubuntu. I really really needed this system as its used for monitoring managed connections. So my brain was racking over ways to get it going again, after many hours googling, i found ms-sys.
What an absoloute lifesaver!!
After grabbing the .deb i installed it, ran a very simple command and got the windows bootloader reinstalled.
An absoloute life saver!