How to know your windows activated using command

There are two method to check your system is activated or not using GUI and CMD

Checking the Windows Activation from the Control Panel
Open it and go to System and Security and then to System. The information you are looking for is shown at the bottom of the System panel.

Checking Windows Activation from the Command Line
faster way to check the status of the Windows activation. You can run the “slui.exe” file, found in “C:\Windows\System32\”.

or activation state: slmgr.vbs /dli

command to activate C:\Windows\System32\slmgr.vbs -ato

On 2003 and other operating systems oobe/msoobe /a
http://technet.microsoft.com/en-in/library/ff793433.aspx