While the latest Windows 11 preview update does include lots of improvements, it's also prone to installation errors.
Microsoft has pulled a buggy Windows 11 non-security preview update to investigate a known issue that triggers 0x80073712 errors during installation.
Microsoft paused rollout of optional KB5079391 update after users hit install error 0x80073712. The cause is currently being investigated.
Secure Boot issues are more common than they should be. Firmware updates, factory resets, and a few PowerShell scripts can fix most of them.