Product activation for Windows – online & support telephone numbers
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.
协作处理 Office 文档 - Microsoft 支持
通过 Microsoft 365 与其他人（包括没有 Microsoft Office 的用户）轻松协作，因为你可以发送文档的链接，而不是发送文件附件，他们可以在 Web 版 Microsoft 365 中查看（和编辑附件）。
Applies To:
Excel for Microsoft 365, Word for Microsoft 365, PowerPoint for Microsoft 365, Excel for the web, Word for the web, OneNote for the web, PowerPoint for the web
激活 Windows - Microsoft 支持
若要在 Windows 11 中检查激活状态，请选择“开始 ”按钮，然后选择“设置 > 系统 ” ，然后选择“激活 ”。 。 激活状态将在“激活”旁边列出。 在“设置”中检查激活状态. 你将在“激活”页面上看到以下一条激活状态消息：
Solve PC problems over a remote connection - Microsoft Support
Use the Windows Quick Assist app to get help with a computer problem from family or friends or help them out. Quick Assist uses a remote connection, so remember to only use it with people you trust, since they can see your computer screen or control your PC (if you allow it).
打开或关闭 Microsoft Defender 防火墙 - Microsoft 支持
若要将其关闭，请将设置切换为“关闭”。 关闭 Microsoft Defender 防火墙可能会使设备（以及网络，如果有）更容易受到未经授权的访问。
Windows 10 2021 Windows 11 (2021 年 10 月) 客户端映像和原始版本 - Microsoft 支持
名称. 版本. KB. 拱门。 语言. 版次.NET 版本 大小. 自定义. Windows 10 专业版，版本 1809. 17763.2237.211007-0715. 累积 KB 5006672.NET KB 5004335. SetupDU KB 5005545. SSU KB - 在 LCU 中
Optimizations for windowed games in Windows 11
Optimizations for windowed games improves gaming on your PC by using a new presentation model for DirectX 10 and DirectX 11 games that appear in a window or in a borderless window.
Create a poll in Outlook - Microsoft Support
Check your poll results. You can see aggregated results in the voting card that is in the body of the email. Click Refresh to see the most updated results or click View in Forms to see detailed responses on forms.office.com.Similarly, you can click on the poll link in the body of the email to track more detailed results on forms.office.com.. Feedback for Microsoft Forms
Applies To:
Outlook for Microsoft 365, Outlook for Microsoft 365 for Mac, Outlook 2021, Outlook 2021 for Mac, Outlook 2019, Outlook 2019 for Mac, Outlook 2016, Outlook.com, Microsoft Forms
KB4023057: Update Health Tools—Windows Update Service components
Important: If your device is out of support, it is no longer receiving security updates from Microsoft and may become more vulnerable to security risks and viruses.Therefore, we strongly recommend that you update to the latest version of Windows. Each version of Windows is supported for 18 months.
Find safe mode and other startup settings in Windows 10
After your PC restarts to the Choose an option screen, select Troubleshoot > Advanced options > Startup Settings > Restart.You may be asked to enter your BitLocker recovery key.