I decided to be brave and upgrade my Surface Pro to the Windows 10 Technical Preview. Upon successfully installing I immediately clicked on the windows button… only to notice the start screen/metro interface launched instead of the start menu, little confused.
It seems, well in my case you need to turn the start menu on.
Head to the Control Panel and open Taskbar and Navigation, click the Start Menu tab, tick Use Start menu instead of the Start screen.
Click ok, you will need to logoff and then log back in for the changes to take effect. Then BOOM clicking the windows button will now bring the start menu up. 🙂