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10-06-2021 07:45 AM - edited 10-06-2021 07:45 AM
To the best of my knowledge, you can't change from MBR to GPT while you are in Windows.
Did you try running the MBR 2 GPT command?
If you have, then you will have to reinstall W10 in EFI mode.
10-06-2021 09:43 AM - edited 10-06-2021 10:00 AM
Before you can run MBR2GPT you have to enable the recoveryoption.
Type in cmd (admin):
If it is enabled you can covert to gpt
If not type:
(if it is not enabled it becomes complicate. )
mbr2gpt /convert /disk:0 /allowFullOS
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