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

HDR content on Windows offers better brightness and color capabilities compared to traditional content (sometimes called standard dynamic range [SDR] content).

Once you've allowed microphone access to your apps, you can change the settings for each app. In Microphone settings, go to Choose which Microsoft apps can access your microphone, and turn on apps you want to use with it.For desktop apps, make sure that Allow desktop apps to access your microphone is turned on.

In Windows 10, action center is where you'll find your app notifications and quick actions—which give you quick access to commonly used settings and apps.

Get support for all Office.com apps, including Excel, Word, and PowerPoint, with step-by-step guidance and troubleshooting.

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Important: Workbook links are considered potentially unsafe and must be enabled when you open a formula workbook.When you open a formula workbook, click Enable Content in the Message Bar to allow the workbook links to function. If you don't, Excel keeps the most recent values and disables refreshing the links with values from the data workbook.

Under 1.Select the hardware, select Tobii EYETRACKING, and then under 2.Select Tobii device, select your device.The page content below the selection changes to show the details of the software package you need to install.

When you open a destination workbook, and the source workbook is not open, you may be alerted by the Trust Bar to update the links. You can control whether the Trust Bar alerts you, and whether to update all links when the alert does not appear.

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).