Keyboard shortcuts

Ctrl+Shift+Esc -> Task Manager (Ctrl+Alt+Del -> Tasks Screen)
Ctrl+Shift+Enter -> Run an executable with elevated privileges
Windows logo key+1-0 -> Launch the shortcuts on the Quick Launch toolbar
Windows logo key+T -> Cycle through programs on the taskbar
Windows logo key+Tab -> Cycle through programs on the taskbar by using Flip 3-D
Ctrl+Windows logo key+Tab -> Use the arrow keys to cycle through programs on the taskbar by using Flip 3-D
Windows logo key+Spacebar -> Bring all gadgets to the front and select Windows Sidebar
Windows logo key+G -> Cycle through Sidebar gadgets
Windows logo key+X -> Open Windows Mobility Center
Open a folder and press & release Alt -> Show Menu Bar (also works in Internet Explorer)

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Right SHIFT for eight seconds = Turn Filter Keys on and off
Left ALT+left SHIFT+PRINT SCREEN (or PRTSCRN) = Turn High Contrast on or off
Left ALT+left SHIFT+NUM LOCK = Turn Mouse Keys on or off
SHIFT five times = Turn Sticky Keys on or off
NUM LOCK for five seconds = Turn Toggle Keys on or off
Windows logo key +U = Open the Ease of Access Center

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GENERAL SHORTCUTS

Windows logo key = Open or close the Start menu
Windows logo key +PAUSE = Display the System Properties dialog box
Windows logo key +D = Display the desktop
Windows logo key +M = Minimize all windows
Windows logo key +SHIFT+M = Restore minimized windows to the desktop
Windows logo key +E Open Computer
Windows logo key +F = Search for a file or folder
CTRL+Windows logo key +F = Search for computers (if you are on a network)
Windows logo key +L = Lock your computer or switch users
Windows logo key +R = Open the Run dialog box
Windows logo key +T = Cycle through programs on the taskbar
Windows logo key +TAB = Cycle through programs on the taskbar by using Windows Flip 3-D
CTRL+Windows logo key +TAB = Use the arrow keys to cycle through programs on the taskbar by using Windows Flip 3-D
Windows logo key +SPACEBAR = Bring all gadgets to the front and select Windows Sidebar
Windows logo key +G = Cycle through Sidebar gadgets
Windows logo key +U = Open Ease of Access Center
Windows logo key +X = Open Windows Mobility Center
Windows logo key with any number key = Open the Quick Launch shortcut that is in the position that corresponds to the number. For example, Windows logo key +1 to launch the first shortcut in the Quick Launch menu.

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WINDOWS EXPLORER SHORTCUTS

CTRL+N = Open a new window
END = Display the bottom of the active window
HOME = Display the top of the active window
F11 = Maximize or minimize the active window
NUM LOCK+ASTERISK (*) on numeric keypad = Display all subfolders under the selected folder
NUM LOCK+PLUS SIGN (+) on numeric keypad = Display the contents of the selected folder
NUM LOCK+MINUS SIGN (-) on numeric keypad = Collapse the selected folder
LEFT ARROW = Collapse the current selection (if it is expanded), or select the parent folder
ALT+LEFT ARROW = View the previous folder
RIGHT ARROW = Display the current selection (if it is collapsed), or select the first subfolder
ALT+RIGHT ARROW = View the next folder
CTRL+Mouse scroll wheel = Change the size and appearance of file and folder icons
ALT+D = Select the Address bar