I) Disable legacy vga (which is incompatible with UEFI) from the EFI boot, using the following commands entered line by line in an elevated (Run as administrator) "Command prompt" window:
bcdedit /store "s:\efi\microsoft\boot\bcd" /set {default} bootlog yes
bcdedit /store "s:\efi\microsoft\boot\bcd" /set {default} bootstatuspolicy IgnoreAllFailures
bcdedit /store "s:\efi\microsoft\boot\bcd" /set {default} novesa on
bcdedit /store "s:\efi\microsoft\boot\bcd" /set {default} quietboot on