Restart Computer
Press Del key while booting to get into BIOS
Make sure it's in Advanced Mode (If it's in Easy Mode press F2)
Go to "Boot" tab at the top
Find: "CSM Support", Make sure its DISABLED, If its not disabled disable it and restart ur pc and continue
Find: "Secure Boot", Set Secure boot to DISABLED
Find: "Secure Boot Mode", It should be Standard, SET it to Custom
Find: "Restore factory keys", Click it, And click YES
You may get a pop up asking you to EXIT WITHOUT SAVING. Press NO
Find: "Secure Boot", Set Secure boot to ENABLED