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。

Contacts can be exchanged between Outlook and Google Gmail to save time and avoid manually re-entering your contacts.

Obtenga información sobre cómo activar Windows con una clave de producto o una licencia digital, comprobar el estado de activación y vincular su cuenta de Microsoft.

Learn how to delete and restore files in OneDrive. Recover deleted files or folders from the OneDrive recycle bin.

Learn how to get older apps or programs to run on Windows 10 or Windows 11 by adjusting compatibility settings.

Learn how to check for, download, and install KB 2919355, an update for Windows 8.1 and Windows RT 8.1.

Learn how to identify a phishing scam, designed to steal money via fake emails.

Learn how you can use timeline to go back to something you were doing earlier, like working on a document or browsing a website, on any Windows 10 PC.

Training: Add and record audio, such as music, narration, or sound bites, to your PowerPoint presentation and select the playback options. Watch this video to learn how.

Active content is additional functionality in a file or program, such as macros, add-ins, or data connections. This article lists types of active content that can be blocked by settings in Trust Center and which, when present in a document, cause display of the Message Bar when you open your file.