Press F10 to open the BIOS Setup Utility. On some computers, it could be the F2 or F6 key to enter into the BIOS. and then select Boot Options. For desktop PCs: select the, and then select Boot
Use the right arrow key to select System Configuration, use the down arrow key to select Boot Options, and then press Enter. Check for Legacy Support in the list. If Legacy Support is not listed, continue to the next step. If Legacy Support is listed and you are enabling Secure Boot, use the down arrow to select Legacy Support, press Enter
UStiR.