Security News > 2022 > August > Windows KB5012170 update causing BitLocker recovery screens, boot issues
Windows users who have installed a new KB5012170 security update for Secure Boot have encountered various issues, ranging from boots failing with BitLocker Recovery prompts to performance issues.
During the August 2022 Patch Tuesday, Microsoft released the standalone KB5012170 'Security update for Secure Boot DBX' to resolve vulnerabilities found in various UEFI bootloaders that threat actors could use to bypass the Windows Secure Boot feature and execute unsigned code.
If your device does not have a valid bootloader, attempting to install the KB5012170 update will generate an 0x800f0922 error and prevent the installation from completing, which is a good thing as your device would no longer boot otherwise.
In addition to the 0x800f0922 error, Windows users are now reporting problems with Windows after installing the KB5012170 update.
As first reported by TheRegister, some Windows users are encountering BitLocker Recovery screens after installing the update.
According to one of their readers, 2% of the Windows 11 devices showed BitLocker recovery screens after installing the update.