The mbr2gpt utility is a program run in the command prompt environment by users seeking to convert an appropriate disk into the GPT format from the MBR partition style without having to delete existing partitions during the process. The tool works best in situations where a user intends to install the Windows operating system in the UEFI boot mode. The disk has certain criteria that should be met before the partition conversion takes place. The tool also offers validation capabilities that can be performed before the actual conversion takes place. This is followed by changing the computer's firmware setting to UEFI mode after the conversion is successful.