the stream

Microsoft: tool to convert MBR disks to GPT

Alexander Bochmann Sunday 09 of April, 2017

Microsoft wrote:
MBR2GPT.EXE converts a disk from Master Boot Record (MBR) to GUID Partition Table (GPT) partition style without modifying or deleting data on the disk. The tool is designed to be run from a Windows Preinstallation Environment (Windows PE) command prompt, but can also be run from the full Windows 10 operating system (OS).

Available in Windows 10 1703 (the "Creators Update")

(Via Firmware Security.)