Using the Windows
User Interface (UI) is the tile-based display used in Windows
8.1. It includes the
following features you can use while working on your Desktop PC.
The Start screen appears after successfully signing in to your user account. It helps organize all the
programs and applications you need in just one place.
You can press the Windows key
to launch the Start screen from any apps.
These are apps pinned on the Start screen and displayed on tiled-format for easy access.
Some apps require signing in to your Microsoft account before they are fully launched.
Windows® 8.1 User Manual