Note: If you start to play a DVD or VCD in the Player Library, the Player automatically switches to Now Playing mode. The Blu-ray Disc format is not supported in Windows Media Player. To play a Blu-ray Disc, you need to use a non-Microsoft program that supports Blu-ray playback and a device capable of reading Blu-ray Discs.

Free. 免费锁屏提醒表示活动Microsoft 365 家庭版或个人订阅不与登录帐户相关联。. 只有 Word、Excel 和 PowerPoint 的免费 Web 版本可供使用。 若要在浏览器中访问这些应用，只需使用 Microsoft 帐户登录到 Microsoft365.com，并从应用启动器 选择所需的应用。. 免费试用Word、Excel 和 PowerPoint

Set up headers and footers to provide different content for different sections of a document.

Discover how to earn Microsoft Rewards points through various activities and redeem them for exciting rewards.

Get help for the account you use with Microsoft. Find how to set up Microsoft account, protect it, and use it to manage your services and subscriptions.

How to find and remove duplicates in Excel. Filter for unique values in large or small datasets to clean up your worksheets and workbooks.

Discover the latest features in Office 2021, including new ways to create content, manage data, and communicate effectively.

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

Explore OneDrive support, help, and learning resources. Learn how to protect your important files, documents, and memories with OneDrive.

You can upgrade from Windows 10 to Windows 11 if your device meets hardware specifications, and if the Windows 11 release has been made available to your device.