Some handy keyboard shortcuts you can use in Windows 8.1

WINKEY - Toggles between Desktop and Start Menu

Esc  Key - If you have the Desktop running it will exit to desktop whenever in Start Menu

WINKEY + ,  Provides Peak of Desktop if open

WINKEY + B Switch to the Windows Desktop and select the tray notification area.

WINKEY + C  Display Charms and notification

WINKEY + D Switch to the Windows desktop and toggle Show Desktop.

WINKEY + E Switch to the Windows desktop and launch Windows Explorer with Computer view displayed.

WINKEY + F - Search Files using the new Windows Search pane.

WINKEY + I - Display Settings pane for the Start screen.

WINKEY + L - Lock PC and return to Lock screen.

WINKEY + M - Minimize the selected Explorer window.

WINKEY + O - Toggle orientation switching on slate and tablet PCs.

WINKEY + P - Display the new options for items like projectors.

WINKEY + Q - Search within Apps using the new Windows Search pane.

WINKEY + R - Switch to the Windows desktop and display the Run box.

WINKEY + U - Switch to the Windows desktop and launch the Ease of Access Center.

WINKEY + X - Switch to the Windows desktop and Administrative tools.

WINKEY + Z - Display the App Bar in a Metro-style app.

WINKEY + 1, WINKEY + 2,  WINKEY + 3 ,,,,  Launches each of the classic desktop Task Bar apps from Left to right.

These are Windows Classic Desktop Keys

WINKEY + .  List all Running Apps

WINKEY + 1, WINKEY + 2,  WINKEY + 3 ,,,,  Launches each of the classic desktop Task Bar apps from Left to right.

WINKEY + B - Select the tray notification area.

WINKEY + C - Display Charms and notification

WINKEY + D - Toggle Show Desktop. Very cool feature to help find other apps / shortcuts on desktop

WINKEY + E. Launch Windows Explorer with Computer view displayed.

WINKEY + F - Search Files using the new Windows Search pane.

WINKEY + I - Display Settings pane for Windows Desktop

WINKEY + L - Lock PC and return to Lock screen.

WINKEY + M - Minimize the selected Explorer window.

WINKEY + O - Toggle orientation switching on slate and tablet PCs.

WINKEY + P - Display the new options for items like projectors.

WINKEY + Q - Search (within) Apps using the new Windows Search pane.

WINKEY + R - Display Run box.

WINKEY + U - Launch Ease of Access Center.

WINKEY + W - Search Settings using the new Windows Search pane. Defaults to Settings first

WINKEY + X - Switch to the Windows desktop and Administrative tools.

WINKEY + Left or Right Arrow - Aero Snap Moves position of selected app.

WINKEY + Up Arrow - Will Maximize Selected App

WINKEY + Down Arrow - Will Change app from Maximize to Normal then to Task Bar of Selected App