Play MP4 files in Windows 10 by right-clicking the file and choosing what application to open it with.

学习如何在 Windows 中解决 USB-C 问题，修复 USB 设备、端口和适配器无法正常工作。

Deinstallieren oder entfernen Sie Apps und Programme in der Einstellungs-App.

Learn about the recovery options in Windows. Find out how to reset your PC, go back to a previous version of Windows, or use media to reinstall Windows.

Skype for Business meeting help. Set up a Skype for Business meeting in Outlook. Join a Skype for Business meeting. Record and playback a Skype for Business meeting

Microsoft 365 を使用してプ本格的なプレゼンテーションをデザインする方法について説明します。 PowerPoint Designer を使用すると、数回のクリックで高品質でカスタマイズされたスライドを作成できます。

Learn more about the privacy settings for speech, voice activation, inking, and typing in Windows.

Get troubleshooting tips if you run into problems downloading, installing, or updating Microsoft Edge.

Microsoft is retiring the Windows legacy inbox Troubleshooters, such as Keyboard troubleshooter and Speech troubleshooter, and the Microsoft Support Diagnostic Tool (MSDT) that runs them.

Learn how to unblock a Microsoft 365 file or presentation that was blocked for security reasons.