And I can't guarantee you anything. Maybe a good story.

OK, I've updated so many BIOS's that I've lost count and yet to lost a board or machine or OS over this. But I've done so many and well, know some ropes and never got hung up.

Fine, but what do I run into? Settings. Yes you told me you can't get to the BIOS. To get there I get out my W10 USB boot/install/repair stick and boot from that. It varies with the PC which F key to press to get it to boot from USB so you should know your PC for that. In a few extreme cases I unplug the HDD to force the machine to use the USB.

In Windows 10's boot/install/repair stick is the repair option and the access to the BIOS. So let's cover how I make that stick. Read Steps 1 to 3 at https://mspoweruser.com/clean-install-windows-10-using-media-creation-tool/ DO NOT GO FURTHER.

https://www.lifewire.com/how-to-access-advanced-startup-options-in-windows-10-or-8-2626229 notes how to use the USB Repair option and more to get to the options to get to the BIOS.

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OK, we're finally in the BIOS settings. But what we do there depends on why it BSODs. From my many encounters it's usually the SATA settings. Sometimes the owner installed the OS in some IDE compatibility mode and if that changes with a BIOS update we only need to set it back and the machine will boot again.

If there is RAID setup involved there is no quick answer there. You have to remember what you set it to and try that again. I'm not a fan of RAID for users that are not into their PCs.

So that should get you into the BIOS and one of the common fixes I know of.