I have a Dell XPS 15 9560, I had to send to the manufacturer to fix some dead pixels.
Before I sent it I had Ubuntu 16.04.01 in a dual-boot format. I followed this tutorial to install it: http://www.nicchan.me/blog/dual-booting-ubuntu-with-windows-10-on-a-dell-xps-15/
Note that I am a linux novice and not a programmer by any means.
Anyway when I got the repaired laptop back, I followed the steps above but encountered a 'Force UEFI Installation?' error, like this guy: Force UEFI Installation
The laptop had been return and the Windows Boot Mode was changed to BIOS compatibility mode, as opposed to UEFI. So I changed it to UEFI.
Even so, I then got the same problem as this guy: partition created to install Ubuntu appears as "unusable"
So it looks like my disk has MBR partitioning (not GPT), as I already have four partitions (including two recovery partitions) my hypothesis is that Ubuntu can't see the space reserved for its installation - due to the maximum of four partitions.
My next step, i'm guessing, is to convert the disk to GPT from MBR.
I tried the demo version of AOMEI Partition Assistant Professional https://www.disk-partition.com/partition-software.html
But the demo version won't let me perform it.
So my question is, would it be worth buying the full AOMEI software to perform this? For all I know it isn't going to help.
I saw another potential option might be to delete one of the recovery partitions, what are the dangers of doing that? How do I do that? the Windows disk management tool doesn't let me.
Any help greatly appreciated. Thank you.