The EFI System Partition may be missing which diskpart would tell. Try the following: Run
diskpart
select disk 0
create partition efi
format fs=fat32 quick
exit
bcdboot C:\Windows
which covers the default case. One disk and one Windows partition.
MBR2GPT error
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(112.00000000000001, 92%, 20%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJW%3C/text%3E%3C/svg%3E)
John Winter
0
Reputation points
I have a windows 10 PC that is eligible for update to Windows 11. Tried to use MBR2GPT to convert disk 0 to GPT. Validation process worked successfully. Conversion crashed and burned with error code: 0x00003687 or error code 0x000036B7. Have tried multiple things but the drive will not boot.
Windows for home | Windows 10 | Performance and system failures
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John Winter 0 Reputation points
2025-11-19T22:50:12.2933333+00:00 Where do I find the files in the previous AI generated answer? I created a recovery USB drive from a Windows 11 PC to help with the recovery. Is this usable in the recovery process?
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(272, 19%, 36%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EVZ%3C/text%3E%3C/svg%3E)
Volume Z 1,480 Reputation points Volunteer Moderator2025-11-19T23:26:25.1833333+00:00 -
John Winter 0 Reputation points
2025-11-19T22:50:44.7533333+00:00 Where do I find the files in the previous AI generated answer? I created a recovery USB drive from a Windows 11 PC to help with the recovery. Is this usable in the recovery process?