Play MP4 files in Windows 10 by right-clicking the file and choosing what application to open it with.

Learn how to access Windows device security settings in Windows Security to help protect your device from malicious software.

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

Teams in Microsoft Teams are collections of people, content, and tools surrounding different projects and jobs.

You can refer to the contents of cells in another workbook by creating an external reference formula. An external reference (also called a link) is a reference to a cell or range on a worksheet in another Excel workbook, or a reference to a defined name in another workbook.

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.

Deinstallieren oder entfernen Sie Apps und Programme in der Einstellungs-App.

Learn how to troubleshoot and use the clipboard in Windows to paste multiple items, pin items, and sync your clipboard to the cloud.

Learn how to troubleshoot Windows Media Player errors. Explore resources for general help with Windows Media Player.

Learn how to pin an app to the taskbar from the Start menu or apps list by right-clicking and selecting the "Pin to taskbar" option.