How to improve gaming on your Windows 11 PC by making use of the optimization for windowed games settings.

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.

Here are some solutions to common problems with the new Microsoft Edge . If Microsoft Edge keeps crashing. If you can't open Microsoft Edge, or if it opens briefly and then closes, or if you’re unable to open specific webpages, here are some things you can try.

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

Learn what to do if Surface won’t turn on, turns on then off, or starts and gets stuck on a screen—a black screen, a screen with a logo, or another screen

Learn how to change Internet Explorer settings, or reset browser settings when there's a problem.

How to access and change the privacy settings in Windows 10 and 11.

Sign out of Teams. While it's a good idea to remain signed in to continue receiving chats, notifications, incoming calls, and other activities, sometimes you might want to sign out of Teams to use another account or for other reasons.

了解如何使用 PIN、面部识别或指纹通过 Windows Hello 登录电脑。

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.