Windows Security is pre-installed on Windows 10 and ready for you to use at any time.

Microsoft Support offers assistance for Microsoft products, including how-to articles, videos, and training for various software and devices.

你可以使用安装介质（U 盘或 DVD）来安装 Windows 的新副本、执行全新安装或重新安装 Windows。 要创建安装介质，请转到软件下载网站，你可以在这里找到分步说明。 在该网站上，你可以选择 Windows 版本，并使用 U 盘或 DVD 创建自己的安装介质。

Firewall & network protection in Windows Security lets you view the status of Microsoft Defender Firewall and see what networks your device is connected to.

Update Microsoft Store. Select Start, then from the apps list, select Microsoft Store.In Microsoft Store, select Library > Get updates.If an update for Microsoft Store is available, it will start installing automatically.

Learn how to stop, cancel or pause uploads and downloads in OneDrive.

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

If you see a gray OneDrive icon, this means you are not signed in. If you cannot sign in to your OneDrive sync app, or the sync app says OneDrive is not connected, follow the steps below.

トレーニング: ビデオを見て、Outlook でメールの連絡先グループを作成し、個々にメールを送信するのではなく、グループにメールを送信できるようにする方法を確認しましょう。

If you already have an account signed in to OneDrive and you want to add or remove another account, you’ll do that in OneDrive Settings.