network environments Archives

Winsage

June 10, 2026

Microsoft: Some Windows PCs fail to install latest monthly updates

Microsoft has warned customers about potential installation complications with the latest monthly updates on certain Windows devices upgraded to Windows 11 versions 24H2 or 25H2. Users may encounter error codes 0x80073712 or 0x800f0993 when attempting to install cumulative updates for June 2026. Affected devices include a small fraction of those running Windows 10 versions 22H2 and 21H2, as well as Windows 11 version 23H2. Users may find that updates have failed, and the specified error codes will appear in the Windows Update log files. Microsoft plans to deploy a resolution for unmanaged enterprise devices and personal PCs after a system restart, with no new devices in these categories affected starting from May 19, 2026. For impacted devices, Microsoft has released specific updates as part of its June 2026 Patch Tuesday to prevent the issue. However, the problem will not be fixed for systems already upgraded to Windows 11 versions 24H2 or 25H2, and users are advised to remove the affected package using a command in an elevated Command Prompt. If this does not resolve the issue, users may need to perform a Windows 11 in-place upgrade. Microsoft has previously addressed similar challenges related to Windows update installations, including issues from the March 2026 non-security preview update and the January 2026 optional non-security preview updates.

Winsage

May 28, 2026

Windows Server 2016 fails to find domain controller

Microsoft has acknowledged an issue with the May 2026 security update for Windows Server 2016, affecting systems with hostnames of exactly 15 characters, which leads to failed domain controller (DC) lookups. The error occurs during DC lookups, specifically returning the error code ERRORINVALIDPARAMETER. Servers with 14 or 16 character hostnames are not affected. Administrators may face challenges with DFS Namespace management and other functions reliant on DC access. Microsoft is investigating the issue but has not provided a timeline for a fix. Windows Server 2016's mainstream support ended in January 2022, but extended support will continue until January 2027.

Winsage

May 26, 2026

Microsoft: Domain Controller lookup may fail on Windows Server 2016

Microsoft has acknowledged an issue affecting Windows Server 2016 systems related to domain controller lookups after the installation of the KB5087537 security update released in May 2026. The problem occurs specifically for devices with hostnames that are exactly 15 characters long, causing domain controller discovery to fail and resulting in an ERRORINVALIDPARAMETER during DCLocator calls. This issue may disrupt administrative operations that depend on domain controller lookups, such as DFS Namespace management. Microsoft is investigating the issue but has not provided a timeline for resolution.

Winsage

May 19, 2026

Microsoft confirms patching issues in restricted Windows networks

Microsoft has issued a service alert indicating that customers in restricted network environments may encounter Windows Update failures, specifically error code 0x80010002, after installing the January 2026 optional non-security preview updates. Affected devices might download the February monthly Windows security update but could struggle with updates released in March and beyond due to changes in download timeout requirements. Microsoft is working on a resolution, and IT administrators can use Known Issue Rollback (KIR) as a workaround by configuring the appropriate Group Policy for their Windows version. A device restart is required to apply these settings. Historical issues include a bug fixed in April 2025 affecting WSUS installations and another issue resolved in August 2025 related to the Windows 11 24H2 cumulative update. Additionally, a KIR fix was provided for a known issue causing the May 2026 Windows 11 security update to fail with error code 0x800f0922.