How to Boot to SD Card

Hey everyone,

New to the community, I bought a Dual Gigabit Carrier Board with CM4 and it has the eMMC so far all is good. Until I tried to flash my eMMC and I ran in to a problem. I downloaded the Windows installer from here Then tried to flash as stated in the guide here So now I am confused as to what I am supposed to do to get this booted. It’s a very nice device and I would love to get it working.

Thank you in advanced for any advice.
P.S. The attached pic is the failed rpiboot_setup.exe