KB4535680, also known as Security update for Secure Boot DBX: January 12, 2021, makes improvements to Secure Boot DBX for a number of supported Windows versions. 12, and I want to warn you about one specific update that is affecting HyperV servers and some consumer level workstations. In addition to third-party virus scanners as the cause, deactivated services can also cause the error (see this German comment).I’m not ready to give an all-clear to the security patches released Jan. The error code 0x800F0922 seems to be a generic error that has various causes. If sfc or dism are reporting system file errors, an Inplaces Upgrade may cure this issue. Try to check the system for damaged files (see Check and repair Windows system files and component store).Then reboot Windows (press Shift key during selecting the Reboot option). The use a vendor's clean tool, to remove install files left on the system. If third party antivirus software is installed, uninstall this product.Use a third party partition tool to check the free space on system reserved partitions. I've seen also cases, where the free space on System reserved partitions is running low.Uninstall the VPN software and try again.

In some cases an installed VPN software blocks the connection to Microsoft's Update servers.Update error 0x800F0922 means that Windows Update don't have a connection with Microsoft's Update servers. More hints may be found within my blog post Windows 10: Analyze upgrade errors. Double click an entry should open the Details tab to get more details about the install error.

Kb4535680 0x800f0922