Training: Watch and learn how to use PowerPoint in Windows. Explore PowerPoint training guides, articles, and how-to videos.

Stay connected to your friends across social networks while gaming on Windows 10/11.

Learn how to tell if your Office software is genuine. To help determine if your Microsoft software is genuine, go to our How to Tell site for more information. Here you'll learn about authentic packaging, including what to look for with product key labels, and Certificate of Authenticity (COA), how to report counterfeit software, and find out what your shopping and licensing options are.

Learn how to free up space for Windows update including deleting nonessential files, using an external hard drive, and updating your hard drive.

联系支持人员 有关 Microsoft 帐户和订阅的帮助，请访问 帐户和计费帮助。. 如需技术支持，请转到联系 Microsoft 支持人员，输入问题并选择“获取帮助”。 如果仍然需要帮助，请选择“联系支持人员”以转至最佳支持选项。 管理员

Find answers to common questions about genuine Windows software.

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

The new Microsoft Edge helps you browse, search, shop online, and more. Like all modern browsers, Microsoft Edge lets you collect and store specific data on your device, like cookies, and lets you send information to us, like browsing history, to make the experience as rich, fast, and personal as possible.

Discusses the release of the Malicious Software Removal Tool (MSRT) to help remove specific prevalent malicious software from Windows-based computers.

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