Bios Update/ boot problem

[Yoshk]

Hello, I updated my BIOS from version 19xx (from 2021) to version 21xx (from 2024), and Windows doesn't seem to boot properly.

-Rog Strix Z390 E gaming
-4080
-I9-9900K
-32GB RAM
-Windows 10 Updated

-The hard drive Windows is installed on is an NVME M2 PCIe drive.
-It is configured in GPT for UEFI boot.
-I boot from "Windows Boot Manager (M2, etc.)" drive.
-I have tested all the options, such as UEFI/Legacy/CSM options, etc.
-I tried enabling an option that "allows booting on PCIe."
-I reflashed the BIOS to see.
-It worked fine before the update.

The most surprising thing is that when I use EZ mode (F7) and manually select the "Windows Boot Manager (M2, etc.)" hard drive, in the "Boot List" option (F8), Windows boots correctly.

[Yoshk]

up 😕

[Jiaszzz_ROG]

Hello @Yoshk 

Thank you for reaching out to us, and sorry for any inconvenience caused by the delayed response.
Based on the situation you described, in addition to recommending that you check whether your SSD requires any firmware or driver updates, we also suggest reviewing the Boot Priority settings in the BIOS to ensure that the correct SSD is selected as Boot Option #1. 
Additionally, please try disabling CSM and enabling pure UEFI mode to see if this results in any improvement. If the issue persists, we recommend temporarily removing all external devices to perform a minimal configuration test, or if possible, cross-testing with another SSD would also be helpful in isolating any potential hardware-related problems.

Thank you.