To convert from MBR Masterboot record or Legacy Boot to GPT or UEFI boot:
1. Boot into windows normally
2. Push WIN + X on your keyboard
3. Hold SHIFT and RESTART system in Safe mode
4. Select TROUBLESHOOT
5. Select ADVANCED OPTIONS
6. Select: Command Prompt
7. In DOS window type: mbr2gpt /validate
8. Then type: mbr2gpt /convert
9. Type: exit
10. Shut down computer.
Either change BIOS from Legacy to UEFI boot or replace computer.
First boot will take a very long time.
Install drivers.