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

Important: If your device is out of support, it is no longer receiving security updates from Microsoft and may become more vulnerable to security risks and viruses.For this reason, we strongly recommend that you update to the latest version of Windows. Each version of Windows is supported for 18 months.

Note: If a compatibility issue has been identified on your device that would disrupt your experience using Windows 11, we will temporarily delay your upgrade until the issue is resolved.Compatibility safeguard holds help ensure you have the best experience possible when upgrading and your productivity is not disrupted if critical apps or drivers are not yet compatible.

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

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.

Why some files won't open in Internet Explorer. Internet Explorer uses add-ons such as Adobe Reader to view some files in the browser. If a file that needs an add-on won't open, you might have an older version of the add-on, which needs to be updated.

Get help with Outlook for Windows, the Outlook app, Outlook.com, and more. Find training videos, how-to articles, and Outlook support content

Excel makes it easy to crunch numbers. With Excel, you can streamline data entry with AutoFill. Then, get chart recommendations based on your data, and create them with one click.

Узнайте, как установить последнюю версию драйвера для принтера. Если вы недавно обновили Windows, вам может потребоваться переустановить драйвер принтера.

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