Reboot and select proper boot device
9871
Computer doesn't boot up, shows PXE error and/or "operating system not found", "no bootable device", "insert boot media", or other similar error
79880
How to boot to the recovery mode if it is not listed in Grub?
29131
Change boot order using efibootmgr
5734
How to boot from USB on my Asus T101HA
137788
Bootable device not found after clean install of Ubuntu 14.04 UEFI on Acer
148973
How to restore Windows boot loader after removing Ubuntu
91747
Is there a command to factory reset Ubuntu?
93257
How to disable Boot menu (F10-F12) on laptop?
43114
How do I set OS X to boot by default?
89132
How to tell if the Windows Installer boots in EFI or BIOS?
479
How can I boot with an older kernel version?
87551
How to repair grub?
19762
How to reset Ubuntu installation
89603
How can I know if reboot is required after update?
63419
What is the boot process of an Android device?
6123
How do I change Windows 7 to boot normally instead of in safe-mode?
3655
How do I make a bootable Ubuntu USB?