Hi. I'm an ASUS Vivobook 16 (M1607KA) owner, not sure where else I can ask for help with this issue. I have just updated my UEFI from version 308 to 324 using EZ Flash (built-in tool in UEFI settings). UEFI was protected with admin password. After this update I cannot enter UEFI - my password is no longer accepted! I'm sure that I'm entering it correctly. There was no indication that there were errors during the update. I have even used the process described in (https://superuser.com/questions/1907203/how-to-recover-reset-lost-uefi-password-on-asus-computer-w-a...) to save a dump of the updated UEFI from Windows and decrypt the password - it is the same as it was before the update, at least that is what the script returns. It is a simple 11 character upper and lower case alpha-numeric password, I have tried to input the first N < 11 characters in case there is a bug in the update like the allowed password length being reduced - to no avail.
Is there a way to rollback the UEFI to the previous 308 version without access to UEFI settings and EZ Flash? BIOS Update for Windows doesn't work since Windows sees that installed UEFI version is the same or newer than in the update (tried both 308 and 324 windows updates), so it does nothing.
Is there a startup key combination to initiate UEFI recovery from the USB flash drive? I have tried putting M1607KAAS.308 UEFI file as is and renamed to M1607KA.bin on a FAT32 formatted USB drive, and powering the laptop with it inserted and pressing ctrl+r, or ctrl+home after power on, or alt+r on the password screen - didn't work.
What else can I try to fix this? I can't even boot this laptop into any USB drive since it needs UEFI admin password for ESC menu before letting me choose which boot menu item to boot. And what is worse - this problem could have potentially happened without my intervention during automatic Windows update.
I'd like to avoid dealing with local support, since I would like to restore full functionality of my laptop as fast as possible. There should be an easy way to at least rollback the UEFI update. Never had such problems with HP and Lenovo laptops before, and they were always password protected in BIOS during updates.
