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

A product key is a 25-character code that's used to activate Windows and helps verify that Windows hasn't been used on more PCs than the Microsoft Software License Terms allow.

Find out how to use Game Bar to capture game play, chat with friends, track achievements, and more.

Windows 11, version 21H2; July 9, 2024—KB5040431 (OS Build 22000.3079) June 11, 2024—KB5039213 (OS Build 22000.3019) May 14, 2024—KB5037770 (OS Build 22000.2960)

Découvrez comment installer, réinstaller ou activer Microsoft 365 ou Office 2019 sur un PC ou Mac.

Learn how to turn on device encryption, or standard BitLocker encryption in Windows.

Get free Windows themes from Microsoft to personalize background, colors and sounds for your PC.

Alternatively, you can install any website by going to the top corner of the browser and select Settings and more … > Apps > Install this site as an app.

To use your microphone with apps on Windows 10, you'll need to turn on some permissions in Microphone settings. Then, you'll need to check your app permissions if you want to use your microphone with apps.

了解如何使用产品密钥或数字许可证激活 Windows、检查激活状态，以及链接Microsoft 帐户。