I have a Lenovo S series running Windows 8.1 (pre-installed). I downloaded Ubuntu 15.04 onto a USB stick and followed the instructions as outlined in the Quick Install From USB docs.
Secure Boot is disabled.
I can successfully boot into Ubuntu and begin the installation process. Around 80% of the way through I get the fatal error:
unable to install GRUB in /dev/sda
I've been through many of the other posts here on this issue, but cannot find a solution that seems to work in my situation. I have tried the 'Try without installing' option, and attempting to install after booting to desktop, but I get the same problem.
As far as I can tell, the issue is with the partition that is being attempted to install to.
Update: Boot Info here: http://paste.ubuntu.com/12447125/
Is anyone able to offer any advice on what might be causing this, or how I should choose/prepare a partition in order to install successfully?