Convert MBR format system disk to GPT format
mbr2gpt.exe 1. start -> settings -> update & security -> recovery -> advanced startup 2. choose an option -> troubleshoot -> advanced options -> command prompts 3. X:\Windows\system32\> mbr2gpt /validate 4. X:\Windows\system32\>mb2gpt /convert 5. Reboot and press Del or F10 (or F1,F2 for Laptop) to BIOS configuration to change BIOS to EFI boot mode On VMware: 5. Have added 100MB EFI sector between C: and Recovery partition References https://www.windowscentral.com/how-convert-mbr-disk-gpt-move-bios-uefi-windows-10 https://docs.microsoft.com/zh-tw/windows/deployment/mbr-to-gpt