In cases where a manual Secure Boot Key Update is required within the ASUS BIOS menu - Please find below instructions:
1. Restart your system.
2. Press Del or F2 during boot to enter BIOS.
3. Go to the Security tab in BIOS.
4. Select Secure Boot.
5. Enter Key Management.
6. Select Platform Key (PK) and choose Enroll Factory Default.
7. Select Key Exchange Key (KEK) and choose Enroll Factory Default.
8. Select Authorized Signature Database (db) and choose Enroll Factory Default.
9. Select Forbidden Signature Database (dbx) and choose Enroll Factory Default.
10. Select Authorized Timestamp (dbr) and choose Enroll Factory Default.
11. Go back to the Secure Boot menu.
12. Set Secure Boot Mode to Windows UEFI Mode.
13. Press F10 to Save & Exit.
14. Confirm changes and reboot.