Windows 10 可让你快速检查网络连接状态。 如果你遇到连接问题，可以运行网络疑难解答以尝试解决该问题。 选择"开始 "按钮，然后选择"设置> Internet"&">状态"。 检查网络连接状态

The recommended (and easiest) way to get SP1 is to turn on automatic updating in Windows Update in Control Panel and wait for Windows 7 to notify you that SP1 is ready to install.

If instructions to install the update don’t automatically appear, you can start the process manually. To do this, press the Xbox button to open the guide, choose Profile & system > Settings > Devices & connections > Controllers & headsets, and then select the controller you want to update.On the Xbox Wireless Controller screen, select “…” to check the firmware version for your controller.

Microsoft Groove Music is brand new for Windows 10. Add your MP3s to OneDrive and you can use the Groove Music app to play your songs on other devices, too—PCs, Windows Phone, and Xbox—for free.

Summary. This update addresses a security vulnerability in the Remote Authentication Dial-In User Service (RADIUS) protocol related to MD5 collision problems. Because of weak integrity checks in MD5, an attacker might tamper with packets to gain unauthorized access.

Contact Support For help with your Microsoft account and subscriptions, visit Account & Billing Help. For technical support, go to Contact Microsoft Support, enter your problem and select Get Help.If you still need help, select Contact Support to be routed to the best support option. Admins

可以从文本或对象（如图片、图形、形状或艺术字）创建超链接，并从“ 插入超链接 ”对话框中链接到网页、同一演示文稿中的幻灯片、不同的演示文稿，甚至电子邮件地址。 你可以在将演示文稿作为幻灯片放映播放时单击这些超链接并查看其屏幕提示。

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

查看文件的以前版本 如果文件存储在OneDrive 或 Microsoft 365 中的 SharePoint 中，则可以返回到文件的以前版本。 如果犯了错误、遇到恶意软件或病毒问题，或者你只是喜欢以前的版本，这一点非常重要。

Functions LOOKUP() The LOOKUP function finds a value in a single row or column and matches it with a value in the same position in a different row or column. The following is an example of LOOKUP formula syntax: =LOOKUP(Lookup_Value,Lookup_Vector,Result_Vector) The following formula finds Mary's age in the sample worksheet: