Step by step guide how to convert disk from Master Boot Record (MBR) to the GUID Partition Table (GPT) partition without loosing data.
1/ Minimum Windows 10 version 1703
2/ Run cmd.exe as administrator
3/ enter command mbr2gpt.exe /convert /disk:0 /allowfullos
4/ change BIOS from legacy tu UEFI !
Done ... enjoy UEFI