Basically it means that the wrong drive has been selected, viz: -
Originally Posted by JASONFUSARO
Above is from https://help.ubuntu.com/community/Gr...alling%20GRUB2
File Not Found (Error 15)
This error is the result of a GRUB 2 installation to /boot but a Master Boot Record ( MBR ) that points to a different partition/location that contains Grub Legacy. This can happen if you don't select your drive when running sudo upgrade-from-grub-legacy. Shortly after starting this command the user will be asked to select the device (sda, sdb, etc). Highlight the drive and press the space bar to select it when presented with this screen. Failure to select a drive will result in an Error 15.
Reinstalling Grub2 and allowing the MBR to be changed so that it points to the partition containing Grub2 can easily remedy this problem.
To recover from this error, GRUB 2 must be reinstalled. Go to Reinstalling from the LiveCD for instructions
Don't forget the "sudo" in the command:
Keep having a crack
sudo apt-get purge grub grub-pc grub-common
I remember having the same issue. I hadn't purged the leagacy GRUB properly. I swore a fair bit before I got it sorted.
When I purged the legacy GRUB and reinstalled from the Live CD and it was all good. I'm running XP & Maverick on 2 different HDDs but I have 3 HDDs in my system.
Over the journey, GRUB in general has caused me to have plenty of education through these forums by other members