Yes, UEFI together with Grub and Windows Boot Manager is complicated.
Assuming that all systems are installed in UEFI mode with GPT:-
One OS on one disk
You can boot the disk via UEFI one time...
Type: Posts; User: tea for one; Keyword(s):
Yes, UEFI together with Grub and Windows Boot Manager is complicated.
Assuming that all systems are installed in UEFI mode with GPT:-
One OS on one disk
You can boot the disk via UEFI one time...
Remove, isolate, de-activate any drive which you want to protect.
Only have the target drive available.
Hopefully, your existing systems are in UEFI mode with GPT because this makes booting via...