Ubuntu boots only out of installer: All boot options are tried
15124
Can't boot Ubuntu or Windows 8 after Ubuntu 64-bit install on Samsung series 7 Windows 8 laptop, error "All boot options are tried."
66116
Grub menu not showing up at boot
39257
How to delete GRUB entirely from GRUB rescue and boot Windows only
149432
Grub Rescue prompt appears after deleting Ubuntu partition. Can't boot Windows
37869
Installation of Ubuntu 14.04 shows error about /boot/efi and takes forever
105082
How do I boot into a root shell?
73121
How can I force Ubuntu to boot on a stuck boot menu?
78405
I can't get grub menu to show up during boot
135382
Ubuntu won't boot - kernel error?
84732
How to get GRUB to be the default bootloader instead of Windows Boot Manager on a UEFI laptop?
63772
I can't boot into a usable system after updates. What should I do?
9466
How to get to the GRUB menu at boot-time?
1385
How do I change the GRUB boot order?
60113
System boots straight into Windows without showing GRUB
105222
Windows 8 won't boot via GRUB after installing Ubuntu with boot-repair
9128
How do I set Windows to boot as the default in the boot loader?
90002
How can I get grub2 to boot a different option only on the next boot?