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.

Follow these steps to automatically diagnose and repair Windows security problems by turning on UAC, DEP protection, Windows Firewall, and other Windows security options and features.

Helping users safely navigate web, app, and game content is one of Microsoft’s top priorities. If you live in a region that requires permission to create an account and access Microsoft services, you may be prompted to request or give parental consent.

若要更改捕获设置，请按“开始”按钮 ，然后依次选择“设置”>“游戏”>“捕获”。 以下部分介绍您可以调整的捕获设置。

If you're unable to open and view the notebook in OneNote for the web, the source of the sync problem is likely with your server. If your notebook is stored on OneDrive, check our Service Status page for any known interruptions or outages. If your notebook is stored on SharePoint, you'll need to contact your administrator to report and troubleshoot the problem.

Resolution. To fix this problem automatically, run the "Fix problems that programs cannot be installed or uninstalled" troubleshooter to repair issues that block program installation or removal because of corrupted registry keys.Important To perform many of the methods and steps in this article, you must be logged on to your computer as an administrator.

Learn how to access Microsoft Store on Windows by selecting the icon on the taskbar or using the search box.

Find out how to submit a case review and learn more about your Xbox enforcements.

Get answers to all of your OneNote questions with our how-to articles, training videos, and support content.

Review the warranty terms, check your warranty status, and learn about the protection plans for your Microsoft device or accessory.