Windows 10: A glitch? Scared to convert from MBR to GPT.

See, my repair guy changed it from UEFI to Legacy and now I can't even enable Secure Boot I could, when it was UEFI. So, I tried the mbr2gpt /allowFullOS /validate and it said MBR2GPT: Attempting to validate disk 0 MBR2GPT: Retrieving layout of disk MBR2GPT: Validating layout, disk sector size is: 512 bytes Disk layout validation failed for disk 0But, my system was UEFI and got changed to Legacy. Why?And when I sometimes do it again, it says it validated successfully. Should I do it when it says successfully? Or what?I'm so confused.

:)

 

Convert only one partition on the disk from MBR to GPT

Step 2
Convert MBR to GPT without data loss

 

Cannot convert GPT to MBR.

Hi Michael,



I suggest you to follow the below steps and check if it helps.

This method you have to backup all your data and delete all partitions and volumes. Then use the
DISKPART command.

• Open command prompt and type in DISKPART and press Enter
• Then type in list disk (Note down the number of disk you want to convert to GPT)
• Then type in select disk number of disk
• Finally type in convert gpt.

Hope the information helps. Do reply if you need further assistance.

 

Convert only one partition on the disk from MBR to GPT

Follow the steps listed here on using GPTgen. He also lists how to create and restore backups.

Converting MBR to GPT without deleting your partitions