I've literally almost tried all the traditional desktop methods but to no effect. Could anyone suggest why this problem occurs, and how this can be resolved?
This might help.
To enter Setup Utility:
(1) Open the Charm Bar by pressing Windows Key-C
(2) Click on Settings
(3) Click on Change PC Settings
(4) Click on General
(5) Scroll to the bottom and click on Advanced Startup -> Restart Now
(6) Click on Troubleshoot
(7) Click on Advanced Options
(8)Click on UEFI Firmware Settings
(9) Click on Restart
To access the Boot Menu:
(1) Open the Charm Bar by pressing Windows Key-C
(2) Click on Settings
(3) Click on Change PC Settings
(4) Click on General
(5) Scroll to the bottom and click on Advanced Startup -> Restart Now
(6) Click on Use A Device
(7) Click on Boot Menu