Microsoft says the August 2026 security update can cause 0xc0000409 errors on Windows Server 2016 systems when the Compatibility Appraiser diagnostic service is enabled, leading to recurring CompatTelRunner.exe crashes. The issue affects physical and virtual machines, including VMware and Azure environments, and Microsoft plans to address it in a future update. #Microsoft #WindowsServer2016 #CompatTelRunner.exe #CompatibilityAppraiser #VMware #Azure

[German]Regular support for Windows 10 Enterprise 2016 LTSC, the IoT version, and Windows Server 2016 will end in October 2026 and early 2027. Microsoft has now announced Extended Security Updates…

Explore Extended Security Updates for Windows Server 2016, Windows 10 Enterprise 2016 LTSB, and Windows 10 IoT Enterprise 2016 LTSB.

Microsoft has restored Windows Server 2016 KB5094122 installs tied to missing KB5087537 prerequisites, helping admins resume June security patching work.

Microsoft has fixed a known issue that caused the June 2026 KB5094122 security update to fail on some Windows Server 2016 systems that had not installed the previous KB5087537 update. The problem triggered 0x80070002 and FILE_NOT_FOUND errors, and affected devices should now install the update normally. #Microsoft #WindowsServer2016 #KB5094122 #KB5087537

Microsoft has released the optional KB5089573 preview cumulative update for Windows 11 25H2 and 24H2, bringing 30 non-security changes focused on performance, reliability, and Windows Hello improvements. The update also adds shared audio, better battery and sensor behavior, and phased Secure Boot certificate rollout while Microsoft notes a separate known issue on Windows Server 2016 after KB5087537. #Microsoft #KB5089573 #Windows11 #WindowsHello #SecureBoot #WindowsServer2016

Microsoft has confirmed a known issue in the KB5087537 May 2026 security update that can break domain controller discovery on Windows Server 2016 systems with hostnames exactly 15 characters long. The bug can cause DCLocator calls to fail with ERROR_INVALID_PARAMETER and disrupt administrative tasks such as DFS Namespace management, while Microsoft continues investigating the issue. #WindowsServer2016 #KB5087537 #DCLocator #DFSNamespace

: With Server 2016 and other OSes for the chop, security fixes can continue to flow for a price