You have probably wondered what the Windows key on your keyboard actually does apart from accessing the start menu. The "Windows Key" is usually located between the CTRL and ALT keys (with a Windows™ logo on it), and it can in fact do quite a few helpful things, such as perform some commonly used shortcuts:
Windows key = Displays taskbar and Start menu
Windows key + E = Starts Windows Explorer
Windows key + F = Finds files or folders
Windows key + CTRL + F = Finds a computer
Windows key + M = Minimizes all windows
Windows key + Shift + M = Undoes minimize all windows
Windows key + R = Displays the Run dialog box
Windows key + Tab = Cycles through the taskbar buttons
Windows key + Break = Displays the System Properties sheet
Windows key = Displays taskbar and Start menu
Windows key + E = Starts Windows Explorer
Windows key + F = Finds files or folders
Windows key + CTRL + F = Finds a computer
Windows key + M = Minimizes all windows
Windows key + Shift + M = Undoes minimize all windows
Windows key + R = Displays the Run dialog box
Windows key + Tab = Cycles through the taskbar buttons
Windows key + Break = Displays the System Properties sheet