The update will be listed as Update for Windows (KB3033055). Select Change PC settings > Update and recovery. Swipe in from the right edge of the screen and select Settings. Depending on your update settings, you might already have downloaded and installed it.
If you're running Windows RT 8.1 Update, Windows 8.1 RT Update 3 will be available as an Important update to download. Updates are installed automatically on Surface through Windows Update. The update is free and available through Windows Update for Surface RT or Surface 2 devices that are running Windows RT 8.1 Update. With the addition of a familiar and easy-to-use Start menu, you'll have quick access to your desktop and all your apps, files, and PC settings in one convenient place. Windows 8.1 RT Update 3 includes improvements to the Windows desktop experience for Surface RT and Surface 2.
Learn about the latest Windows update for Surface RT and Surface 2, including new desktop and Start menu options. Note: Some products might not be available in your country or region.
