bcdedit /set GUID device partition=D: bcdedit /set GUID osdevice partition=D: bcdedit /set GUID path \Windows\system32\winload.efi bcdedit /displayorder GUID /addlast
bcdedit /enum Or for a cleaner view:
bcdedit /create /d "Ubuntu Linux" /application osloader bcdedit /set GUID device partition=G: bcdedit /set GUID path \ubuntu\vmlinuz bcdedit /set GUID options "root=/dev/sda3 ro" add boot option windows 11
bcdedit /create /d "Windows 10 on D:" /application osloader This returns a GUID like xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx . Copy it. bcdedit /set GUID device partition=D: bcdedit /set GUID
Then set the partition and OS path:
Note: Easier to use GRUB. But for direct boot: add boot option windows 11