Question SSD not booting after recreating bootloader following failed MBR/GPT conversion

[Domino00]

Hi all, I needed to enable secure boot after a GPT conversion via the CMD prompt but it appears the conversion failed (no asterisk under "GPT" in the diskpart in the attached pic). It wouldn't boot to the OS so I attempted to recreate the bootloader following the steps here to no avail.

I can only boot to the Windows 10 repair USB otherwise I get an "OS not found on the partition" message. Can anyone advise? Thank you.

 

[SkyNetRising]

Execute this:

bootsect /nt60 C: /force​

C: - here is 500MB bootloader partition.
If bootloader partition has a different drive letter, then change accordingly.

Make sure CSM is enabled.

 

[Domino00]

@SkyNetRising Thanks for the reply. CSM is enabled.

 

[SkyNetRising]

@SkyNetRising Thanks for the reply. CSM is enabled.

Wrong syntax.
There has to be space symbol between "C:" and "/force"

bootsect /nt60 C: /force​

 

[Domino00]

My fault. It executed but still receiving an error that an OS was not found.