Must Know Shortcut Keys for Windows 7:

Windows + Up Arrow

Use this shortcut key in Windows 7 will make your windows explorer, web browser, or any applications to expand to its maximize size. 

Windows + Left Arrow

This shortcut helps you to align the focused window to the left side.

Windows + Right Arrow

This shortcut helps you to align the focused window to the right side.

Windows + Down Arrow

Minimizes the windows explorer or any application to the taskbar.

Windows + Space

Windows become transparent to show the desktop, and as you release the key it comes to the normal position.

Windows + T

Shows the aero peak preview of all running applications.

Windows + P

This shortcut key in Windows 7 shows the  presentation options of the display on your projector.

Windows + (+ / -) 

This shortcut key enables the Magnifier to view the windows in Magnified view.

Shift + Click A Task Bar Item

Clicking on a particular item in task bar opens a new instance in the application. If you click on the browser in the task bar, it opens a new tab.

Windows + F

This key open a Windows 7 search in the explorer.

Windows + X

This key opens the  Windows Mobility Center.

Windows + E

This key opens the Windows Explorer.

Windows + [Number]

This shortcut key opens the pinned task bar item, Windows + 1 will open the first pinned application on the task bar.

Windows + Tab

This launches the Windows Aero task switcher.

Windows + Pause

This will open the system properties window.

 Windows  + Ctrl + F

Searches for a computer if you are connected through network.

Ctrl + Shift + Click On Icon [Task Bar]

This Shortcut Keys opens a new instance of the particular application from the taskbar with administrator privilege

Alt + D

This opens the address bar in the explorer.

Alt + Win + [number]

This Key Opens the pinned task bar application in jump list.

Windows + B

This Shifts the System Tray icons one by one.

Win + G

This shortcut cycles between the Gadgets on the Windows 7 screen.

Ctrl + Esc

This shortcut key opens the start menu in the Windows 7

Ctrl + Shift+Esc

This Windows 7 key opens the Windows Task Manager.