I used to use grub to boot into fedora (which was one sda9, or hd0: 9) and Windows (which was on sdb1 or hd1: 0).
I played around with it, and fucked it up, when I turn on my computer, I get the grub menu, I can boot into fedora and mount all my partations beautifully.
But when I boot Windows, I get the "Windows is loading", and then the computer shuts off.
What also weird is; when I boot my Windows installation cdrom, it gives me the good ol' "Windows cannot detect any hardisks..." error, so I cannot do FIXMBR and FIXBOOT.
I also get a few strange messages when I first boot my computer, RAID related. As I said, any livecd boots my system, and I can mount all my partations (from the livecds, AND the installed fedora system), I just cannot boot into Windows.
Any ideas?