Microsoft released an out‑of‑band (OOB) update to address several issues identified after the deployment of the January 2026 Windows security update. These issues include:
- Applications becoming unresponsive or displaying errors when opening or saving files stored in cloud‑backed locations
- Learn More: Known Issue with App Unresponsiveness
- Installations of Outlook becoming unresponsive and failing to open when PST files are stored in cloud‑backed storage such as OneDrive.
- Please Note: ITS strongly recommends storing PST files locally rather than in OneDrive or other cloud‑backed locations to help ensure the best performance and reliability in Outlook.
This new OOB update includes all protections from the January 2026 Windows security update and incorporates earlier fixes for remote desktop connection issues and hibernation failures (as described in the notification below).
Install via Windows Update
The OOB update is available through Windows Update for Windows 11 devices running the January 2026 updates. It will appear in Windows Update only on devices that previously installed one of the impacted updates.
To install it, open Settings > Windows Update, and select Download and Install. Some devices may install the update automatically.
IT administrators using Microsoft Intune or Windows Autopatch should reference the following resources for installing the OOB update via Windows Update:
- Expedite Windows quality updates in Microsoft Intune
- Deploy an expedited quality update using Windows Autopatch
Install via Microsoft Update Catalog
The OOB update is available from the Microsoft Update Catalog for supported versions of Windows Server and Windows 10.
Reference the following resources for detailed installation instructions:
- Windows 11, versions 25H2 and 24H2: KB5078127
- Windows 11 Enterprise versions 25H2 and 24H2: Hotpatch KB5078167
- Windows 11, version 23H2: KB5078132
- Windows 10 ESU (22H2) and Windows 10 Enterprise LTSC 2021: KB5078129
- Windows Server 2025: KB5078135
- Windows Server, version 23H2: KB5078133
- Windows Server 2022: KB5078136
- Windows Server 2022 Datacenter: Azure Edition: Hotpatch KB5078238
- Windows Server 2019 and Windows 10 Enterprise LTSC 2019 KB5078131
Please email crimsonservicedesk@wsu.edu for any questions.