You can play high-definition videos (HD, Ultra-HD, or 4K) in the Movies & TV app on Windows. To enjoy high-definition quality, make sure that: The video itself is HD or 4K (not SD) Your hardware (device and screen) can play high-definition (check the manufacturer’s website)

Info: Basic information about the preview, including eligibility requirements.; Announcements: The latest news about the preview, including release notes, scheduled play times, and contests.; Activities: Quests: Scenarios that you can step through and provide feedback about the experience.Complete quests to earn XP. Surveys: A quick way for you to send feedback to developers about a preview ...

Press the Start button on the taskbar, enter settings in the search bar, and then select Settings.; If you’re on a Windows 10 device, select Update & Security.If you’re on a Windows 11 device, select Windows Update.; Select Check for updates to see if any updates are available for your device.; After the updates have downloaded, select Install now to start the installation.

如果在 Surface 上无法使用恢复选项，则需要下载这些文件以使其重新正常工作。 注意: 如果你是管理组织中的 Surface for Business 设备的 IT 管理员，请参阅 恢复工具 (Surface IT 工具包) 了解将受支持的 Surface 设备还原到其出厂状态的另一种方法。

App & browser control in Windows Security provides the settings for Microsoft Defender SmartScreen, which helps protect your device from potentially dangerous apps, files, websites, and downloads. The settings on the App & browser control page let you: Block unrecognized apps, files, malicious sites, downloads, and web content.

When you install the web version of Outlook as a progressive web app, you can do things like pin and launch the web version of Outlook from your computer's home screen or task bar and access your account while you're offline.

Microsoft Authenticator is a mobile app that helps you sign in to all your accounts without using a password. Notes: Microsoft Authenticator is not available for PC or Mac as authenticator apps are typically designed for smartphones for security reasons.

App publishers sometimes update their apps to add new features and fix problems. Microsoft Store on Windows can automatically install app updates. Select the Start button, then search for and select Microsoft Store.

Xbox Support offers help for Xbox, Game Pass, and billing questions. Get advice and customer service in the Xbox Support community.

If none of those options work, select the Start button > Settings > Accounts , then find the Microsoft account you used to sign in to the Xbox app and select Remove. Then go back to the Xbox app and sign in with the Microsoft account you just removed. Open Settings