Windows Secure Boot certificate expirationÂ
Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updated in time. To avoid disruption, we recommend reviewing the guidance and taking action to update certificates in advance. For details and preparation steps, see Windows Secure Boot certificate expiration and CA updates.
Support for Windows Server 2008Â R2 will end in January 2026
Windows Server 2008 R2 Premium Assurance will end on January 13, 2026.
Windows Server 2008 R2 Extended Security Updates (ESU) ended on January 10, 2023. Additionally, Extended Security Updates on Azure only support ended on January 9, 2024. For more information, see Extended Security Updates for Windows Server overview.
We recommend that you upgrade to a later version of Windows Server. For more information, see Overview of Windows Server upgrades.
Summary
Learn more about this out-of-band update, including improvements, any known issues, and how to get the update.Â
Windows Server 2008 R2
This out-of-band update includes fixes and improvements that are part of the following update:
The following is a summary of the issues that this update addresses. The bold text within the brackets indicates the item or area of the change we are documenting.
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[Message queuing (MSMQ) (known issue)] Fixed: After installing the Windows updates released on December 9, 2025, users experienced issues with the Message Queuing (MSMQ) functionality. This issue also impacts a clustered MSMQ environment under load. This issue might lead to message queues becoming inactive, messages about insufficient resources, applications unable to write to message queues, error messages about the message cannot be created, or messages about insufficient disk space or memory. Individuals using Windows Home or Pro editions on personal devices are very unlikely to experience this issue. This issue primarily affects enterprise or managed IT environments.
For more information about the resolved security vulnerabilities, please refer to the Deployments | Security Update Guide and the December 2025 Security Updates.
For information about the various types of Windows updates, such as critical, security, driver, service packs, and so on, see Description of the standard terminology that is used to describe Microsoft software updates. To view other notes and messages, see Windows 7 SP1 and Windows Server 2008 R2 SP1 update history.
Known issues in this update
We are currently not aware of any issues with this update.
How to get this update
Before installing this update
To install any Windows Server 2008 R2 Monthly Rollup released on or after January 14, 2025, we recommend you first install the latest Servicing Stack Update (SSU). If your device or offline image does not have the latest SSU installed, you might not be able to install this update.
Caution:Â Until you install the SSU, this update might not be offered to your device. To reduce your security risk, install the SSU as soon as possible.
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If you use Windows Update, the latest SSU (KB5071810) will be offered to you automatically. If the latest SSU is not installed, you might not be able to install this update.
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If you use the Update Catalog, we recommend you download and install the latest SSU (KB5071810). If the latest SSU is not installed, you might not be able to install this update.
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If you are a Windows Server Update Services (WSUS) administrator, you must approve SSU KB5071810 and this update KB5074977.
For general information about SSUs, see Servicing stack updates and Servicing Stack Updates (SSU): Frequently Asked Questions.
Language packs
If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Learn about adding a language pack to Windows.
Install this update
To install this update, use one of the following release channels.
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This update is only available from the Update Catalog. |
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To get the standalone package for this update, go to the Microsoft Update Catalog website. To download updates from the Update Catalog, see Steps to download updates from the Windows Update Catalog. |
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This update is only available from the Update Catalog. |
File information
A list of the files that are included in this update are provided in a CSV (Comma delimited) (*.csv) file. The file can be opened in a text editor such as Notepad or in Microsoft Excel.
