Stuck in GNU grub
Tried to wipe Linux with disk partition manager (whoops)

... How to boot to windows? Win10 updated days ago if that helps...

Navigatinf to boot directory is issue.

ls (hd0,gpt3)/which directory to boot file?


Tried /efi as per YouTube solution - file not found. So bootable file directory still lost for me. Appreciate any help.

If you have WIPED one of the Windows partitions, recovery may not be something to expect an unexperienced non-professional to be able to accomplish. You may have to reinstall Windows in that case.

A first thing to try is the Windows recovery process. If the problem is that GRUB was not removed at the stage-1 but the linux homes stage-2 is gone, this might just get you going again.
This does assume that you did NOT totally wipe a Windows partition, and is certainly worth a try.
I have nto run Windows since before EFI was a "thing", so I cannot vouch for the recovery systems ability to rebuild the EFI mount and partition.

If you were booting whichever Linux OS you installed and windows 10 from the Grub boot menu and deleted the Linux partition, you deleted the majority of the Grub boot files which are on the Linux system partition. If windows 10 is EFI, there should be an entry for windows 10 in the Boot Options of the BIOS firmware. Have you tried that?

If that was your Linux partition and you actually deleted it from windows, that won't help as it doesn't exist. You could try booting windows from a grub prompt (grub>) with the entry below, change the (hd0,gpt1) to whatever your EFI partition is.

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Go into the firmware menus (what we used to call the BIOS) and choose the Win10 entry to boot, then set it as the default. Fixed.

How to accomplish this from Grub command line?

No, that's before Grub.
Hardware dependent hotkeys will get you into BIOS.

See if fwsetup works to get you to the firmware/bios menu from the grub prompt. If not it will be by pressing one of the f-keys or maybe the esc or shift key when you first hit the power button to turn on the system.

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Explained in post 3. If that doesn't work you need to select the EFI option in the BIOS firmware as suggested in several posts above. Do you know how to access the BIOS?

This is a classic case of "Youtube syndrome". I'm not blaming the OP; I'm blaming the people who put these videos up on Youtube and often don't really know what they are doing. An innocent newbie follows their instructions and hoses his system.

I wish there was some way of grading these videos because at present it's a jungle out there.

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Yes that worked. now I don't know the BIOS password. Is there any way around that short of removing the circuit board and short circuiting the SCA SLC thingo. Struggling to get the circuit board loose

"Tried to wipe Linux with disk partition manager (whoops)"

You WHAT? You have to install Windows.

We all know now that he should have repaired the Windows boot before removing Linux. He did not know that when he started. Too late to go back unless you have a time machine.