Windows 中的网络问题疑难解答. 如果无法获取电子邮件、浏览 Web 或流式传输音乐，则很可能未连接到网络，无法访问 Internet。

Learn how to use mail merge in Word to create custom documents, envelopes, email, and labels with individualized elements for each recipient.

Any other add-ins that are listed under COM add-ins were installed by other software. To determine whether the performance problem is caused by add-ins, run Outlook in Safe mode. To do this, press and hold Ctrl when you start Outlook. When Outlook starts in Safe mode, all COM add-ins and Exchange Server client extensions are disabled.

扩展或加载项是自定义浏览器体验并为你提供更多控制权的简单工具。 下面介绍如何在 Microsoft Edge 中添加、关闭和删除扩展或加载项 。

Here are answers to some common questions about codecs. What's a codec? A codec compresses or decompresses media files such as songs or videos.

Learn how to set up your user account for multifactor authentication with Microsoft 365.

When Microsoft Excel detects a corrupted workbook upon opening, it automatically starts File Recovery mode and attempts to repair the workbook.

How to use the LOOKUP function in Excel to search in a single row or column and find a value from the same position in a second row or column.

Delegate access is when you give someone permission to access your mailbox or specific folders in your mailbox with the added ability of being able to create and respond to messages on your behalf.

Learn how to troubleshoot Windows Media Player errors. Explore resources for general help with Windows Media Player.