Windows 10: "No Boot Device Found" after converting MBR to GPT disk and "roll back" to MBR

Hello, everyone. I was wondering if there's a way to fix the "No boot device found. Press any key to reboot..." In upper lines it says, "PXE-E61: Media test failure, check cable." When I enter BIOS, the hard disk isn't showing blank. However, when I run tests on Diagnostics, it is there and shows me that "All tests passed."The thing is that I was trying to install Windows 10 to one of the partitions of the hard disk, which is MBR from a bootable USB drive on my laptop, but it required GPT to proceed the installation, so I used a tool called "GDISK" to do the conversion.After real

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convert MBR to GPT disk

convert mbr to gpt

There is a way to convert mbr to gpt without data loss. clean command deletes all datas inside the disk, so dont use this command

boot with windows dvd , and get into command prompt

type diskpart , find the disk number , which is need to convert mbr to gpt

say disk number is 0

exit diskpart

type below command in command prompt

mbr2gpt /convert /disk:0

wait for some minutes to complete , once you get commpleted successfuly means, exit and close ,

shutdown the pc , remove windows dvd

important

After the disk has been converted to GPT partition style, the firmware must be reconfigured to boot in UEFI mode.


Make sure that your device supports UEFI before attempting to convert the disk.

 

Converting a MBR disk to a GPT disk

This BS Microsoft stop forcing us to convert from MBR to GPT

-> The MBR scheme will work for disks up to 2 TBytes.

I don't care whether it might boot up quicker

-> MS does not claim that GPT boots up faster than MBR.

 

Convert only one partition on the disk from MBR to GPT

Step 2
Convert MBR to GPT without data loss