If you wish to change MBR to GPT, there is an MBR2GPT tool in Windows for system disks that are compatible with this software. Before using the utility, it is necessary to make sure that the system and disk correspond to Microsoft standards and also to have a backup of the data on the disk. The conversion process will result in changing the partition scheme and preparing the disk for UEFI boot mode. Once the process is completed, the change in the firmware might become necessary from Legacy BIOS or Compatibility Support Module to UEFI. Do not interfere with the process.
