This cumulative update for Windows 11, version 25H2 and 24H2 (KB5077181), includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. To learn more about differences between security updates, optional non-security preview updates, out-of-band (OOB) updates, and continuous innovation, see Windows monthly updates explained ...

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Learn how to use Manage and Optimize Drives to keep your disk and data drives defragmented and at top performance in Windows.

Learn how to troubleshoot problems when playing Xbox games from the cloud on an Android device.

Learn how to use the Gaming Services Repair Tool to troubleshoot installation and update issues with Gaming Services on PC.

For information about Windows update terminology, see the article about the types of Windows updates and the monthly quality update types. For an overview of Windows 10, version 22H2, see its update history page. Note Follow @WindowsUpdate to find out when new content is published to the Windows release health dashboard.

此安全更新包括以下更新的修补程序和质量改进： 2025 年 12 月 9 日 - KB5071546 (作系统内部版本 19045.6691 和 19044.6691) 2025 年 12 月 18 日 — KB5074976 (作系统内部版本 19044.6693 和 19045.6693) 带外 下面是此更新在安装此更新时所解决的问题的摘要。 如果有新功能，也会列出这些功能。 括号中的粗体文本表示 ...

If you see error 0x80080005 on an Xbox console when you install, update, or launch a game, restart the console and then try the game again.

Check the Xbox services, games, and apps for any service outages.

Microsoft Support