How to Convert MBR Partition to GPT Partition
This video records how to convert a MBR Partitioned OS disk to a GPT Partitioned OS Disk on a Windows 10 computer.
Windows 11 needs Secure Boot and GPT partion. If you want to upgrade a Windows 10 computer with MBR partioned OS disk to Window 11, you have to convert the OS disk partion from MBR to GPT first before you can run in-place upgrade to upgrade the Windows 10 comptuer to a Windows 11 computer.