Windows 8 and 8.1 is a totally new version of Windows that as well as having the traditional desktop it also has the new style interface (previously known as Metro) which is set as the default to appear when the system boots.
If you prefer the ‘traditional’ desktop view, simply click on the desktop tile to enter Desktop mode, or press the Windows key + D. ( +D).
In windows 8.1 you can also configure Windows to boot directly to the desktop instead of booting to the Start screen.
3. In the Taskbar and Navigation Properties box that opens, click the Navigation tab.
Windows should now boot directly to the desktop, if you want to go back to Start-screen booting, just repeat the process and uncheck the box in step 4.