I've tried many things in previous threads, including every suggestion in (I receive the error 'grub-install /dev/sda failed' while attempting to install Ubuntu as the computer's only OS.).
I'm a first timer (obvy). I want to dual boot with Windows 10. It's a Dell machine with some mysterious partitions. Originally I installed Ubuntu 16.04.2 successfully, but with legacy on in BIOS/UEFI. Learned that I'd have to go into 'bios' each time I wanted to run it.
Attempt to reinstall with legacy off, repeatedly get
executing grub-install /dev/sda failed
Boot-repair throws an error too, with the txt file apparently having some invalid characters - pastebin.
Boot-repair error says:
If your computer reboots directly into Windows, [which it does] try to change the boot order in your BIOS. If your BIOS does not allow to change the boot order, [which it doesn't, at least it doesn't provide an Ubuntu option] change the default boot entry of the Windows bootloader. [which looks way too advanced for me].
Ideally I want to choose which OS to launch on boot.
Something's not right here, but I've tried:
- Running ubuntu live USB and then launching from desktop.
- Multiple attempts to manually create partitions (with /boot partitions in both EFI and FAT32 formats, and none at all using this guide How to use manual partitioning during installation?)
- Multiple attempts using the replace existing Ubuntu installation option.
Always the same grub-install error. Assume it's something to do with the original legacy-enabled install and, erm, me. Partitions after my latest failed attempt are thus (I manually created partitions from sda7+).
I have NO idea where to from here.