edit: Shit shorry, please move! :'( :'( :'(
I posted this at gaf and no one fucking helps, gaf sux. So, halp evilbore
So I tried to boot into Windows earlier and got an error saying something along the lines of "something has changed etc etc and Windows won't work now." Didn't even load up the desktop. I boot back into OSX and got this:

And my Windows HD icon is gone. What the fuck?
My Vista is legit, it was a student upgrade disc from XP, before anyone asks.