can't boot into UEFI/Bios X570 PRO4

wow ... finally some progress :-)

- removed the nvme ssd
- same as before, just black screen :-(
- inserted usb with ubuntu something on it, reset, it booted! Well, it was the next media with something to boot from ...
- reset, splash screen back!!!! YAY!
- booted into Linux, worked
- booted into Windows, back to start, no boot screen, no boot into UEFI

so it seems that windows screws something up. I will re-install it and hope that will fix it. I also updated my UEFI while i could enter it but this makes no difference ...

I will update this thread once i made a fresh installation of Windows.

Thank you!

Ray62 wrote: So you configured "Enabled with UEFI lock" In the Credential Guard Configuration box as described in the Microsoft article? =>> Then you should know what you have to do!

No, i didn't. That was in the part how to enable it on that page (which I never did, seems Hyper-V did it on installation), i only used the part below "Disable Windows Defender Credential Guard".

Any Idea how i can check if UEFI lock is enabled?

I installed and tried boot to uefi (from ASRock page). I reboots to a black screen and nothing happens. If i press ctrl alt del it reboots into windows. (i assume it reboots, i can't see anything)

I also disabled fast boot, it was indeed activated, but it makes no difference.
(i never touched the setting before)

Hi,

Before: i have Windows 10 and Linux on the same nvme ssd, everything fine. I installed Hyper-V which screwed up my VMWare installation and since then my problems started. First Linux stopped working, boot never finished. Next VMWare couldn't start my VM anymore because of this:
https://kb.vmware.com/s/article/2146361
So i did everything described in the Microsoft article and that caused the disappearance of UEFI.

- if i do nothing the system boots normally into win10
- i can't enter the UEFI with F2
- there is no boot "screen" with the bios information anymore (was in text mode before)
- last bios version was 1.40
- no OC, most settings default

what i already tried:

- removing the cmos battery and bridging the cmos reset header (first battery, than only cmos header and lastly i tried both).
- Restart to UEFI ver:1.0.6, nothing happens, black screen after reboot
- i removed all devices i could, now only nvme and GFX card (and USB stuff)
- ASRock Live Update isn't showing any bios updates, only drivers (yet, 1.70 is on the webpage)

so ... any ideas how to fix it? I searched the documentation, it seems there is no bios rescue mode or bios install without entering the bios?

appreciate any help, thanks!