The Secure Boot Forbidden Signature Database (DBX) prevents UEFI modules from being loaded. The background is that Windows devices with UEFI (Unified Extensible Firmware Interface)-based firmware can be operated with Secure Boot enabled. The reason was a vulnerability that allowed a bypass of Secure Boot. This should fix this error you may have to restart the PC after enabling this setting.Microsoft released the security update KB5012170 (Security update for Secure Boot DBX) on Aug(see also Windows Security Update KB5012170 for Secure Boot DBX (August 9, 2022)). NET frameworks installed on the computer and click "OK". Click "Turn Windows features on or off".Type “Windows Features” in the search bar.
NET framework being used by your PC to run a Windows program, then you should also make sure that it is enabled. You don't have to perform any action if the troubleshooter detects any problem, it will fix it automatically.
Wait for the troubleshooter to detect the possible reasons why you got the “Windows failed to install the following update with error 0x800f0922" message. Under the "Systems and Security" menu, click on "Fix problems with Windows update".Type “Troubleshoot” in the search bar on top.Press Windows key + X and select "Control Panel".To find and use the Windows 10 troubleshooting tool, here are the steps: Using the Windows troubleshooting option, you can fix this issue. However, it is not so certain that it was your VPN or internet connection that caused this error, so if this method doesn’t work, try the other ones. Most times, the 0x800f0922 Windows 10 error message pops up due to an unstable Internet connection. If you’re connecting to the Internet using a VPN, you should deactivate it and try running the update again. The first thing to check when you get the 0x800f0922 error on Windows 10 is your Internet connection.
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