Note: If you have a built-in display that can play streaming HDR video, but doesn’t support HDR games and apps, use Display calibration for HDR video found in Settings > System > Display > HDR.. To check if your display supports HDR games and apps, under Display capabilities on the HDR settings screen, see if the selected display says Use HDR is Supported or Not supported.

Windows 8.1 Update and Windows RT 8.1 Update (also known as KB 2919355) include improvements that make your favorite apps and settings easier to find and use, provide more familiar mouse and keyboard options, and update security and performance.Here’s what you need to know about installing this important update. Check to see if it’s already installed

New to Xbox gaming on PC? Here's how to get started.

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.

Find Microsoft Excel help and learning resources. Explore how-to articles, guides, training videos, and tips to efficiently use Excel.

Optimizations for windowed games improves gaming on your PC by using a new presentation model for DirectX 10 and DirectX 11 games that appear in a window or in a borderless window.

Sign in using two-step verification or security info; Create app passwords in Security info (preview) Set up a phone call as your verification method

Here are a few different ways to find help for Windows. Search for help - Enter a question or keywords in the search box on the taskbar to find apps, files, settings, and get help from the web.

Learn how to download, install, and configure Language Accessory Packs for Microsoft 365 for additional display, help, and proofing tools.

Important: You don't need to remove old security information unless there is an account security risk (e.g. someone else has access to your old mailbox).