WIN -> switch between Modern Desktop Start screen (Metro) and the last accessed application
WIN + C -> Charms bar
WIN + Q -> App Search screen
WIN + F -> File Search screen
WIN + W -> Settings Search screen
WIN + X -> Windows Tools Menu (Admin Menu)
WIN + PrtScn -> Takes a screenshot and saves it in the Pictures folder
WIN + E -> Windows Explorer
WIN + R -> Run dialog box
WIN + D -> Show/Hide all windows
WIN + L -> Lock computer
WIN + UpArrow -> Maximize current window
WIN + DownArrow -> Minimize current window
WIN + TAB -> Cycle through open apps in Modern Desktop (Metro)
ALT + TAB -> Cycle through open apps
Shift + Delete -> Permanently delete the item (without sending it to the Recycle Bin)
PrtScn -> Takes a screenshot of the screen and place it in the clipboard