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Release Date:



Security-only update

  • As of January 10, 2023, Microsoft no longer provides security updates or technical support for Windows 7 Service Pack 1 (SP1). We recommend that you upgrade to a supported version of Windows. For more information, see Update that enables you to upgrade from Windows 7 to a later version of Windows.

  • Windows Server 2008 R2 Extended Security Updates (ESU) third and final year ended on January 10, 2023. Additionally, Windows Server 2008 R2 on Azure ended support on January 9, 2024.

    We recommend that you upgrade to a later version of Windows Server. For more information, see Overview of Windows Server upgrades

  • Windows Thin PC reached the end of support on October 12, 2021. Extended Security Updates are not available. For more information, see Windows Thin PC.

  • Windows Embedded Standard 7 Extended Security Updates reached end of support on October 10, 2023. For more information, see Windows Embedded Standard 7.

  • Windows Embedded POSReady 7 Extended Security Updates will end after October 8, 2024. For more information, see Windows Embedded POSReady 7.


Learn more about this security-only update, including improvements, any known issues, and how to get the update.

Note As of July 2020, optional non-security releases for this operating system are no longer offered. Operating systems in extended support have only cumulative monthly security updates.

Verify that you have installed the required updates in the How to get this update section before installing this update.

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.


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.

  • [DST] The official name of the former “Republic of Turkey” is changed to Republic of Türkiye in English. For more information about DST changes, see the Daylight Saving Time & Time Zone Blog.

  • [IME] In some scenarios, an Input Method Editor (IME) will either not show or show in an incorrect position.

  • [RADIUS protocol] A security vulnerability exists in the Remote Authentication Dial-In User Service (RADIUS) protocol related to MD5 collision problems. For more information, see KB5040268.

  • [Windows Installer] When the installer repairs an application, the User Account Control (UAC) does not prompt for your credentials. After you install this update, the UAC will prompt for them. Because of this, you might have to update your Automation scripts and add the Shield icon. This indicates that the process requires full administrator access. To turn off the UAC prompt, set the HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Installer\DisableLUAInRepair registry value to 1. For more information, see:

For more information about the resolved security vulnerabilities, please refer to the Deployments | Security Update Guide and the July 2024 Security Updates.

We are currently not aware of any issues with this update.

How to get this update

Before installing this update

We strongly recommend that you install the latest servicing stack update (SSU) for your operating system before installing the latest Rollup. SSUs improve the reliability of the update process to mitigate potential issues while installing the Rollup and applying Microsoft security fixes. For general information about SSUs, see Servicing stack updates and Servicing Stack Updates (SSU): Frequently Asked Questions.

If you use Windows Update, the latest SSU (KB5039339) will be offered to you automatically. To get the standalone package for the latest SSU, search for it in the Microsoft Update Catalog.

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.


Next step


This update is not available from Windows Update. See the Update Catalog or Server Update Services release channel.


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.


Next step


This update will automatically sync if you configure Products and Classifications as follows:

  • Product: Windows Server 2008 R2 Service Pack 1

  • Classification: Security Updates

For more information about configuring in WSUS, see Windows Server Update Services (WSUS).

For more information about configuring in Configuration Manager, see Synchronize software updates.

Reminder If you are using Security-only updates, you will also need to install all previous Security-only updates and the latest cumulative update for Internet Explorer (KB5040426).

File information

For a list of the files that are provided in this update, download the file information for update KB5040498.

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