désolé c'était le pb inverse :
Q: I installed Fedora Core 2, and now I can't boot into Windows! (Updated 17 July 2004)
A: This should only happen if you installed a Fedora Core 2 Test Release and then upgraded to the Final version of Fedora Core 2. (If you don't know what that means, don't worry -- it doesn't apply to you.)
This actually isn't specific to Fedora, it happens on many Linux distributions using the new 2.6 kernel.
If you have this happen to you, here's how to fix it:
1. Open a Terminal.
2. Become root:
su -
3. Type this:
sfdisk -d /dev/hda | sfdisk --no-reread -H255 /dev/hda
Sinon tu peux éventuellement booter en rescue, chrooter /mnt/sysimage et faire ensuite un grub-install
@+
