Ubuntu grub disappeared after installing Windows 8.1 Preview
5413
How can I repair grub? (How to get Ubuntu back after installing Windows?)
10645
Windows 8 UEFI does not boot
21732
Can't load GRUB all of a sudden (UEFI problem)
23908
How can I reinstall GRUB to the EFI partition?
9466
How to get to the GRUB menu at boot-time?
78405
I can't get grub menu to show up during boot
101071
Windows 7, Windows 8 entries missing after reinstalling grub
130661
grub-install: this GPT partition label contains no BIOS Boot Partition
157857
How do I boot my PC from GRUB?
146201
'Upgraded' to Windows 10 on dual boot, and can't boot to Ubuntu partition
85340
Windows 10 upgrade led to grub rescue
143712
Repair Grub after install windows?
129293
How to get Windows 7 back after installing Ubuntu (Linux)
121308
How do I get the GRUB menu to show when starting my dual-boot system?
99655
WUBI installed Ubuntu not showing up at boot menu after Windows reinstallation
202
How do I install Ubuntu alongside a pre-installed Windows with UEFI?
67834
UEFI/BIOS seemingly missing