Entering bios from grub rescue

Question

I was running two os - Windows and Linux, but I've deleted my previous linux distribution because I wanted to install ubuntu instead and I accidentally forgot to fix MBR and right now I'm stuck with grub rescue. And I wanted to ask, if there is any way to enter bios to set boot order to as a first priority so I can fix this? Pressing function keys, esc and delete didn't work, so I hope that maybe there is another way. Thank you for your help :)

Solution

Yes, but not from the GRUB rescue shell. You need to enter the BIOS before GRUB shows up. The details depend on your machine but there should be a message displayed during POST that tells you what key to press to enter "Setup".

The key is often one of Del, F12 or F2, so try those if you don't see a message. You need to do this before the GRUB screen loads though.

Comments

[Rod Smith]

F2 is another common one. Some computers even use Esc. There is frustratingly no standardization on this critical issue.

[psifidotos]

@RodSmith There wasn't a standard before, with BIOS, so I'm not exoecting one now for UEFI.