The guide below will let you people help to know the process to update Windows and pre-installed apps on Surface RT, which is a different process than regular Windows operating system. So, just continue after the break if you want to update Windows and applications on your Surface RT tablet.
Update Windows and Apps on Surface RT
Tap on “Charms” menu > “Settings” > “Change PC settings” and scroll down to the option “Windows Update” and tap on “Install and Restart” button there and let it complete the process and that’s it
To update pre-installed apps, tap on “Store” from “Start” screen
Tap on “Update” text in the right upper corner of screen, and let it complete the process of grabbing updates for apps