Troubleshoot activation errors. If Microsoft 365 can't activate, it eventually becomes unlicensed and all editing features of Microsoft 365 are disabled.

If you continue to experience issues signing in with your original profile, disable Windows Defender services: Open the Services app by typing services in the search box on the task bar and selecting it from the list of results. Then, find the Windows Defender Advanced Threat Protection and Microsoft Defender Antivirus services, right-click each of them, select Properties , and change Startup ...

摘要 此更新对 Windows 11 版本 24H2 中用于功能更新的 Windows 安装程序二进制文件或任何文件进行了改进。 如何获取此更新 安装此更新 若要安装此更新，请使用以下发布频道之一。

此外，Office 2021 需要定期重新激活，并且也可能由设备组件更改（需要 Internet 连接）触发。 未能重新激活可能会导致应用程序进入缩减功能模式，或者你可能会遇到 未经许可的产品错误。 如果无法连接到 Internet，应考虑Office LTSC。

Explore OneDrive support, help, and learning resources. Learn how to protect your important files, documents, and memories with OneDrive.

在快速设置中： 若要查找蓝牙的快速设置，请选择任务栏右侧的时间和日期旁边的 网络、 声音或 电池 图标 ( ) 。选择“蓝牙 ”将其打开。 如果在未连接任何蓝牙设备的情况下打开，则它可能显示为“未连接 ”。 如果在快速设置中看不到蓝牙，则可能需要添加它。

Enter your Email, phone, or Skype name in the first box if you know it.; In the Contact email address text box, type an email address where we can contact you or send your password reset link. Note that this email address should be different from the one you’re trying to recover. In the third text box, type the characters displayed on the screen.

Plug the USB end of the adapter into a USB charging port on your second display. If your display doesn't have a USB charging port, plug the USB end into any standard USB Type-A charger with 5W (5V/1A).

To activate Windows 10 using an internet connection: As Windows 10 will automatically activate if you are connected to the internet, you can confirm your activation status by selecting Start > Settings > Update & Security > Activation and looking under Windows.. If online activation fails, first try the activation troubleshooting in Activate Windows 10.

了解如何从 Microsoft 365 商业版订阅下载和安装所需的应用。 提示 登录可将应用连接到 Microsoft 365 的其余部分，使你能够将文件保存到云、与他人共享文件，并在工作时自动保存文档。