Microsoft has fixed a known issue causing the June 2026 security updates to fail on Windows Server 2016 systems that weren't up to date.
The issue was acknowledged in an admin portal service alert confirming IT administrators' reports of 0x80070002 or FILE_NOT_FOUND errors on affected systems.
The bug primarily affected customers attempting to install the KB5094122 update without first installing last month's KB5087537 security update.
Microsoft says the security update installation issue has now been resolved, and affected devices should no longer experience installation failures when deploying the June 2026 KB5094122 security update.
"Microsoft received reports that the June 2026 security update (the Originating KBs listed above) might fail to install on some devices running Windows Server 2016," it noted.
