Découvrez comment installer Office 2013 sur PC ou Office pour Mac 2011.

Learn how to check for, download, and install KB 2919355, an update for Windows 8.1 and Windows RT 8.1.

Learn how to use Microsoft Edge for mobile devices, sync your browser data, and get answers to common questions.

Find answers to common questions about genuine Windows software.

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.

Learn more about what background apps are in Windows and how to turn them off when you're not using them.

Learn how to set up a connection to a proxy server on your Windows PC.

To use your microphone with apps on Windows 10, you'll need to turn on some permissions in Microphone settings. Then, you'll need to check your app permissions if you want to use your microphone with apps.

Learn how you can manage cookies and site data you've temporarily allowed in Microsoft Edge.

With reputation-based protection Windows users can be better protected from potentially unwanted apps (PUA).