W10 21H2 will not install on a 240GB GPT device.

I used Disk Partition to Clean my new internal 240 GB SSD (Installed on a H110Pro MB). I formatted it as a GPT disk using Disk Management and all is well until I try to install Windows 10 21H2 from a USB drive that I created using the Microsoft Creation Tool. I have to boot the USB drive as USB. If I choose the UEFI Partition 1 option the system hangs. The USB drive is a Lexar 16GB formatted as Fat32. Windows 10 21H2 will install if I Delete all the stuff that was created when I formatted the SSD using Disk Management but... it always ends up as an MBR disk. The system in question currently boots from an old external 120GB SSD and is formatted as GPT!

I'm sure I have installed Windows may times using a Lexar 16GB USB drive and ended up with a GPT installation. I'm running out of ideas. Help would be greatly appreciated.

If your BIOS has CSM/Legacy boot enabled, set it to UEFI only and try installing again.

^agreed.

Thanks for the quick response. That worked!

However, I think it may have worked without changing the BIOS if I would have just been patient when I chose to boot the USB from UEFI Partition 1. After changing the BIOS as suggested it only gave me one boot option (UEFI Partition 1) but I still got the "Junk" displayed across the top of the screen for many seconds until W10 completed booting from the USB.

BIOS settings
Set Disk mode to AHCI, not RAID
Select OS mode = UEFI or Select OS mode = other + UEFI (depends on BIOS).
Disable fast boot and secure boot (you can turn it on after installation)

Windows can be installed in two ways: Legacy-MBR or UEFI-GPT
To install as Legacy-MBR you must boot the installation drive as Legacy
To install as UEFI-GPT you must boot the installation drive as UEFI.

As you have a new MB, you should install as UEFI-GPT
Detach any other drives (SATA or Power cable) from the MB.

During POST, press F12(?) to launch the boot menu. You will see two options for the USB drive. USB UEFI (Name) and USB (Name). Select USB UEFI (Name).
Go to install and delete ALL partitions on the drive till you have one and only one unallocated space and then proceed.
If you don't want to use MS account, don't enable updates or connect to the internet during installation.