You need to install in UEFI mode, but does it boot in CSM/BIOS mode? From UEFI menu you should get two boot options if secure boot is off.
If secure boot is on, Ubuntu still should boot in UEFI mode as it has Microsoft signing key. Only signed bootable systems will boot if secure boot is on.
Have you updated UEFI/BIOS from vendor. They also have issues with UEFI and are doing major updates.
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