[FIX] Requested system device not found bcdedit bootrec
I could not show the procedure from scratch because I had already followed these steps.
Partition IDs can be found here : https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/set-id
Run cmd as administrator
type diskpart, then press enter
select disk 0
select partition 2 (or whichever one you recognise as your EFI Partition)
set id=c12a7328-f81f-11d2-ba4b-00a0c93ec93b
exit
exit
Then boot to recovery command prompt using a windows 10 installation USB.
From there run these commands:
bootrec /fixmbr
bootrec /fixboot (Don't worry if this command throws an error)
bootrec /rebuildbcd
Don't worry if the second command throws an error.
These methods did not work for me, but may work for you if this video did not help:- https://www.partitionwizard.com/partitionmagic/the-requested-system-device-cannot-be-found.html