Secure Flash Check Fail on Z690 Extreme

Hi there,
Let me start by letting you know that english is not my first or second language so bear with me.
1.- Download 3 or 4 previous versions above your currently running version and below the latest version.
2.- Start flashing your UEFI chip from the eldest version.
3.- If you get the same problem where you get the aforementioned error that means that the files you downloaded are getting corrupted therefore not passing the correct checksum.
4.- Keep flashing your UEFI until you are able to flash to the latest version or find out if you are getting the same error.
5.- Things to consider:
As you flash new versions the POST times are extended and the computer might reboot several times before booting into your operating system.
If you get the same error in all of the downloaded versions, that means that something is corrupting your downloaded files and not passing checksum verifications.
You can always check the files with a checksum calculator, I strongly recommend a local calculator and not online.
Checking MDA/SHA on Linux is super easy, on most distros all you have to do is right click the file.
You can always download the UEFI files in a different computer and using a different flash drive in case the computer you are using is infected or something is injecting code into your downloaded files.
I strongly suggest using 7zip to decompress zipped UEFI files, it has a built-in checksum calculator.