I've installed a Linux distribution on a friend's PC. He does not know how to use Linux or even Windows very well, and I'd like for it to be as easy as possible. When I installed GRUB, it detected his recovery partition that HP installed for him, and its the first Windows in the list.
After some googling and looking through the grub manual and config files, I still can't figure out how to hide a partition from GRUB. I looked at 30_osprober, but didn't see any clear way to exclude an OS.
Can anyone point me in the right direction for excluding an OS / patition from the GRUB menu?