Hotkeys are used many times by users to perform a certain task , if they know the shortcut key combination .
So here are the shortcut keys for Windows 8 with the task they perform .
Windows key : Brings up the Metro start screen.
Win + D : Show the desktop .
Win + C : Open the Charms menu, where you can search, share, and change settings .
Win + X : Opens a list of various windows programs & options at the bottom left of desktop .
Win + I : opens the Settings panel .
Win + H : opens the Share panel.
Win + Z : opens the App Bar .
Win + Q : Opens the Metro App Search screen.
Win + F : Opens the Metro File search screen.
Win + W : Opens the Metro Settings search screen.
Win + K : Opens the Devices panel (for connecting to a projector or some other device)
Win + , (comma) : Aero Peek at the desktop.
Win + . (period) : Snaps the current Metro application to one side of the screen. (Right side)
Win + Tab : opens the Metro application switcher menu, switches between applications.
Win + Shift + . (period) : Snaps the current Metro application to the other side of the screen. (Left side)
Win + J : switches focus between snapped Metro applications.
Win + Page Up / Down : moves the current app to the other monitor.
Win + R : Opens run .
Win + Enter : Launch the narrator .
Win + Spacebar : Switch between the input languages ( If more than 1 language is installed ) .