This security update includes fixes and quality improvements that are part of the following updates: January 13, 2026—KB5073724 (OS Builds 19045.6807 and 19044.6807) January 17, 2026—KB5077796 (OS Builds 19045.6811 and 19044.6811) Out-of-band January 24, 2026—KB5078129 (OS Builds 19045.6812 and 19044.6812) Out-of-band The following is a summary of the issues that this update addresses ...

Find out how to fix network connectivity problems when using Xbox multiplayer and chat features on Windows 10/11.

This security update includes fixes and quality improvements that are part of the following updates: December 9, 2025—KB5071546 (OS Builds 19045.6691 and 19044.6691) December 18, 2025—KB5074976 (OS Builds 19044.6693 and 19045.6693) Out-of-band The following is a summary of the issues that this update addresses when you install this update. If there are new features, it lists them as well ...

Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

联系 Microsoft 支持人员。查找常见问题的解决方案，或从支持专员那里获取帮助。

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

This out-of-band update for Windows 11, version 23H2 (KB5077797) is cumulative. It includes updates from previous security releases, along with an additional fix. 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. For information on Windows update ...

本文介绍了启用了 Windows 8.1、 Windows RT 8.1、 Windows Server 2012 R2、 Windows 8，Windows RT，Windows Server 2012，Windows 7 和 Windows Server 2008 R2 中的 根证书的 Windows 程序 的紧急更新的更新。应用此更新之前，请参阅更多 有关此更新，请查看本文中的 系统必备组件。 关于此更新 Windows 根证书程序允许受信任的根 ...

Find a solution if you can't hear friends, can't join or host a multiplayer game online, or are getting a NAT related error on Xbox.

This out-of-band update for Windows 11, version 25H2 and 24H2 (KB5078127) is cumulative. It includes updates from previous security and non-security releases, along with an additional fix. 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. For information ...