As the title states. I rebooted my PC today and was greeted with a "BIOS is updating. Do not turn off or unplug from power."

I have an Asus Sabertooh Z170 mark 1. The only Asus utility I have is AI Suite 3 for fan control. No EZ-Update.

I have read that windows can push BIOS updates however I see nothing stating anything remotely to an Firmware update in the update history. In fact the last installed update was on the 14th of August..which was a cumulative & security update.

The 'new' updated firmware is 1703...which is from 2016.

The latest release as stated on the Asus website is 2018 April.

I have run 'Get-WindowsUpdateLog' in Powershell and searched that for any clues - Nothing. This 'update' isn't recorded anywhere.

How can I dig deeper to see what executed this install and where it came from?

  • You appear to be confusing Windows updates with BIOS updates. Make sure you keep them separate in your investigations. To check on BIOS updates, you are going to have to look at ASUS tools and logs.
    – schroeder
    Sep 2, 2022 at 15:53
  • I mentioned Windows Updates due to the fact other uses have reported seeing "ASUSTek Computer Inc - Firmware" as a listed installed update after their forced auto BIOS update. Again, I don't have any ASUS BIOS tools installed.
    – SheerKahn
    Sep 2, 2022 at 15:59
  • Yes, I understand, but when searching, don't assume that the Windows update logs will include the BIOS updates. They are different things.
    – schroeder
    Sep 2, 2022 at 16:02
  • Apologies, misunderstood your direction. Outside of the Windows Update logs I don't see anything else that could have recorded events? Not sure where else to look.
    – SheerKahn
    Sep 2, 2022 at 16:06
  • 1
    @schroeder Windows Update can deliver BIOS updates, so it's actually a sensible idea to check its history. I'm not sure if that kind of update would appear in the logs though.
    – gronostaj
    Sep 2, 2022 at 16:15

1 Answer 1


Further digging into each and every Windows Update found the following:

How it looks in Windows Update History:

2022-08 Security Update for Windows 10 KB5012170:

What it is: Security Update for Secure Boot DBX

Windows devices that has Unified Extensible Firmware Interface (UEFI) based firmware can run with Secure Boot enabled. The Secure Boot Forbidden Signature Database (DBX) prevents UEFI modules from loading. This update adds modules to the DBX.

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