There are multiple reasons why the Legacy Boot is greyed out in your system BIOS. The following suggestions will help you fix the problem. Before you proceed, if you are using Intel NUC products, you ...

Is your PC not booting after updating BIOS? Some users have reported that they can’t boot their computers right after installing a BIOS update. While the issue is likely to occur due to a failed BIOS ...

This should be on by default ...

If you bought a pre-built desktop PC, it’s a safe bet that the manufacturer optimized the basic input/output system (BIOS) settings for the hardware in the box—though it never hurts to check them out ...