Access, download, or run the Surface app and the Surface Diagnostic Toolkit to help find and solve Surface problems.

If your purchase of Office or Microsoft 365 came with a product key, you enter your product key on one of the websites listed below for your product.

Get the steps for showing your favorites bar in Microsoft Edge and Internet Explorer 11.

Learn how to go passwordless on Windows with Windows Hello and your Microsoft account.

Learn how to reinstall Windows on your PC and how activation works after it's installed.

Learn about the differences between a Microsoft 365 subscription, Office 2016, and the free Office Online apps.

If you’ve forgotten your Microsoft account password, learn how to do a password reset online or by using your Xbox console.

Training: With Microsoft Outlook on your PC, Mac or mobile device, you can organize email, share your calendar, schedule meetings, and share files. Watch this online video.

Learn how to view, manage, and delete cookies in Microsoft Edge.

Learn the differences between Microsoft 365 plans for home or business and find the best option for your needs.