This cumulative update for Windows 11, version 25H2 and 24H2 (KB5079473), 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 ...

If you see error 0x8015DC0B, it means that some services are no longer available in all regions.

Learn more about which Microsoft Casual Games titles you can play on Windows PC and Android/iOS mobile devices.

Xbox Support ... Xbox Support

Microsoft正在对永久许可证的激活体验进行现代化改造。 从 2025 年 12 月 3 日起，传统的基于电话的产品激活自动化过程已从电话转移到在线。 客户将改用产品激活门户： 产品激活门户 新的数字工作流提供更安全、更可靠且用户友好的激活体验，并有助于防止欺诈。 虽然该过程已更新，但脱机激活 ...

Trying to sign you in Cancel

在 Outlook 中查找电子邮件地址？ 使用 "搜索通讯簿" 框。

Describes how to use the System File Checker tool to troubleshoot missing or corrupted system files in Windows.

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

Find the info you need to play Microsoft Casual Games - The Zone, including gameplay troubleshooting, available platforms, and answers to frequently asked questions.