3 easy steps to fix secure disk win 10

Here's a very simple step-by-step guide:

Many ssd drives are in mbr format and it needs to be gpt for secure boot.  To save time and energy below are the 3 steps.

1. Open Command Prompt as Administrator:
Search for "Command Prompt", right-click on it, and select "Run as administrator". or 
crtl+altdel - new task - type cmd - tick admin box.
2. Validate the disk: Type:  mbr2gpt /validate /allowFullOS and press Enter. This command checks if the disk can be converted
3. Convert the disk:
If validation is successful type: mbr2gpt /convert /allowFullOS and press Enter to begin the conversion. 

Change BIOS to UEFI: After the conversion, restart your computer and enter the BIOS settings. Locate the boot settings and change the boot mode from legacy (or CSM) to UEFI. 
Boot into Windows: Your computer should now boot into Windows with the GPT partition style.

Important Considerations:

Backup: While MBR2GPT is designed to convert without data loss, it's always recommended to back up your important data before making any significant changes to your system's partition scheme. 

BIOS/UEFI: Ensure your motherboard supports UEFI and that your BIOS settings are correctly configured for UEFI boot mode after the conversion. 

System Reserved Partition: After the conversion, you may see a System Reserved partition. You can remove the drive letter from this partition in Disk Management if you wish. 

Hope this helps a few people as it really helped me.