Learn how to share Microsoft 365 Family subscription benefits with up to five people. Manage invitations, devices, and people you've shared Office with.

获取 Windows 操作系统的官方支持和帮助信息，以及如何使用 Windows 的指南。

Learn how to remove malware from your PC. Use Microsoft Defender Antivirus in Windows 10 or Windows 11 to scan your PC for malware, viruses, or other threats.

Welcome to Sticky Notes! We're still the best way to write quick notes on your Windows desktop, but now you can also take your sticky notes with you, allowing you to capture, find, and use your notes across apps and your favorite devices.

Learn how to change or reset your Windows password if you've forgotten or lost it.

Learn how to upgrade Windows 10 Home to Windows 10 Pro to access more advanced security and networking features.

Learn how to download, customize, and troubleshoot Windows Media Player 12 with helpful guides and tips.

系统要求. 手机连接 体验从 Windows 电脑和 手机连接 开始。 从电脑中，可以使用预安装在设备上的连接至 Windows 应用或从 Google Play 或 Samsung Galaxy Store 下载的应用连接到选择 Android、Samsung、HONOR、OPPO 和华硕设备。

使用 vlookup、hlookup 和其他函数（如 index 和 match）根据您输入的值搜索和查找数据。 本文将让您快速回顾 vlookup，然后链接到更多内容。

Learn how to type a letter online using Word for the web. Choose a letter template for online letter writing. Edit, send or print your letter online.