You'll lose all the data on the MBR disk while converting it to GPT, so back up or move them before proceeding. Press Windows + R keys, and type diskmgmt.msc in the dialog box to open the Windows ...
We will be discussing the following two methods by which we can change the BIOS Mode from Legacy to UEFI without reinstalling Windows 11/10- Convert MBR to GPT using the Windows built-in utilities.