BSOD after bios latest update

[cenwozuzu]

So here's my issue. Prior to updating my BIOS on my Asus Z790 Maximus Hero MB yesterday afternoon, I had no issues or blue screens of any kind. After I updated it via USB, I started getting a blue screen for "kmode exception not handled/ntoskrnl.exe a few minutes after login to my computer. The only time I don't get the error message (at least temporarily) is as soon as I log into my computer and go directly to load a video or something then I can get into various things.

I've reseated my dimms 2 and 4,

I've gone into CMD via admin and tried various commands and they all come back with no issues,

I've updated all the drivers,

I've also turned off XMP1 various times

The moment I close the video, I get that ntoskrnl exe BSOD.

I've also tried reinstalling windows via a USB, but a few moments later I get a BSOD with just kmode exception not handled then restarts. I built the PC 2 years ago. I was told it could be that I have to change the CMOS battery. 

[JohnAb]

I have no experience with your motherboard or BIOS, but it seems that the best plan of action will be simply to flash back to the previous BIOS version. Sadly, BIOS problems are not unknown...

I'm assuming that you didn't try to load your old saved BIOS settings? If you did, that could explain your problems. In that case, reset the BIOS and create your preferred settings again manually. 

[cenwozuzu]

I forgot to mention that I last back to my BIOS to what it was before I updated it, and I get that same BSOD. No, I didn't load my old saved BIOS settings and have entered them manually. When I power on my computer, it says I have to reinstall the OS as I do in the original post, but get the kmode exception not handled BSOD. 

[FixItWorse]

What version of Windows are you running? Also, are your drivers up to date to the best of your knowledge?

[cenwozuzu]

Prior to the bios update of BIOS and after Windows 11.

Yes I had done prior to updating the BIOS when I was able to access my computer.

[FixItWorse]

And was your reinstall clean, or in place?

[cenwozuzu]

"I've also tried reinstalling windows via a USB, but a few moments later I get a BSOD with just kmode exception not handled then restarts". I get that error each time I try to load from the USB

[achugh]

Hi @cenwozuzu have you tried with BIOS defaults? Make sure you are on the latest BIOS in case your have downgraded to an older version.

Now disconnect the power cable to your power supply and follow the CLEAR CMOS procedure for your board to clear any settings. Reconnect the power cable and start your PC. If your CLEAR CMOS was successful you will see a message asking you to press F1 to go into BIOS and then press F5. Do that and don't change anything else. Now SAVE and EXIT BIOS and boot into Windows.

Use your machine like you normally do (not watching video but other things). Hopefully everything will work.

If no BSOD, then shutdown your PC. Wait for about 1 min. Start your PC up and go back into BIOS and ONLY change your memory to XMP II. SAVE and EXIT to go back into Windows. Test as above. If everything works then shutdown and wait for 1 min.

When you start your computer again, go back into BIOS and change to XMP 1. SAVE and EXIT. Boot into Windows and test. If everything works, shutdown and wait for 1 mins.

Start your PC one last time and go back into BIOS and now slowly start adjusting your setting as needed by repeating the above process. This will help you narrow down what configuration does not work anymore with the updated BIOS and try to find an equivalent setting under the new BIOS by asking here once you have narrowed down the configuration.

Good luck!