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January 13, 2026—KB5073697 (Monthly Rollup)

Applies To

Windows Server 2008 Premium Assurance

Windows Secure Boot certificate expiration

Important: Secure Boot certificates used by most Windows devices have started expiring 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.

End of support information

Windows Server 2008 Premium Assurance ended on January 13, 2026.

Windows Server 2008 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 cumulative security update, including improvements, any known issues, and how to get the update.

Windows Server 2008

This security update includes fixes and quality improvements that are part of the following update:

The following is a summary of the key issues that this update addresses. The bold text within the brackets indicates the item or area of the change we are documenting.

[Windows Deployment Services (WDS)] This update introduces a change in behavior in which WDS will stop supporting hands-free deployment functionality by default. Admins should review guidance and follow instructions provided in Windows Deployment Services (WDS) Hands-Free Deployment Hardening Guidance.
[Drivers] This update removes the following modem drivers: agrsm64.sys (x64), agrsm.sys (x86), smserl64.sys (x64) and smserial.sys (x86). Modem hardware dependent on these specific drivers will no longer work in Windows.

For more information about the resolved security vulnerabilities, please refer to the Deployments | Security Update Guide and the January 2026 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 for Windows Server 2008 SP2, see Windows Server 2008 SP2 update history.

Known issues in this update

We are currently not aware of any issues with this update. For the most up-to-date information about known issues for Windows Server 2008 SP2, please go to the Windows release health dashboard.

How to get this update

Before installing this update

To install any Windows Server 2008 SP2 Monthly Rollup released on or after January 14, 2025, you must first install the latest Servicing Stack Update (SSU). If your device or offline image does not have the latest SSU installed, you cannot install this update.

Caution

Until you install the SSU, this update will not be offered to your device. To reduce your security risk, install the SSU as soon as possible.

If you use Windows Update, the latest SSU (KB5071812) will be offered to you automatically. After the latest SSU is installed, you will be able to install this update.
If you use the Update Catalog, you must download and install the latest SSU (KB5071812). After the latest SSU is installed, you will be able to install this update.
If you are a Windows Server Update Services (WSUS) administrator, you must approve SSU KB5071812 and this update KB5073697.

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.

Windows Update
Update Catalog
Server Update Services

Available	Next step
	This update will be downloaded and installed automatically from Windows Update.

Available	Next step
	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.

Available	Next step
	This update will automatically sync with Windows Server Update Services (WSUS) if you configure Products and Classifications as follows: Product: Windows Server 2008 Service Pack 2 Classification: Security Updates

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.

Download the file information for cumulative update KB5073697 now.