boot – Booting a 2-partition Windows 10 installation from GRUB2 command-line

I’m using a GRUB2 prompt after booting from a Linux rescue USB flash drive (finnix-123) – trying to boot my Windows 10. It is on an SSD with MBR rather than GPT, with two partitions: one of about 100 MB, the other filling the rest of the disk. Both partitions are NTFS. The second partition is “hibernated”. I can’t boot that SSD directly, probably because my new computer’s UEFI doesn’t support booting from MBR disks (although I’m not 100% certain that’s the reason).

So, I tried the instructions suggested here:

insmod part_msdos
insmod chain
set root="(hd1,msdos1)"
chainloader /EFI/Microsoft/Boot/bootmgfw.efi

(my system has two disks, hd0 which is the flash drive, and hd1 which is the SSD I want to boot.)

but the last command results in an error about the file not being found.

Can I still boot my Windows somehow via my grub2 prompt? If not – can I boot it some other way without writing to the disk?

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