Comment 27 for bug 610898

Attached is a patch to the lupin-support package which should prevent grub-install.real from being used on wubi systems where wubi was installed to a disk other than "C:" . Instead on upgrades users with such a configuration will be warned that grub failed to install.

This is not a complete fix, and users with such a config will still eventually run into problems booting *Ubuntu* due to the core.img and modules never being updated to match incompatible updates to their grub.cfg . But their mbr won't be overwritten with a broken grub install, so they won't be prevented from booting Windows.

I have ideas for a complete fix but due to the seriousness of this bug (I'm seeing on average 1 person per day with an unbootable machine due to this bug in #ubuntu and #grub on irc.freenode.net alone) I think a simple patch that can more easily get an SRU and fixes the most critical aspect is important first.