You have a product key that is used by a Microsoft product. Since the software is asking you for the license key, that means the software initially installed correctly so I am assuming you are running Microsoft Windows.
The loss of a key can result from moving or duplicating a hard drive or moving a system.
Click Start > Programs > Accessories > System Tools > Windows Activation. This should allow you to perform the activation steps.
Last Wiki Answer Submitted: June 16, 2012 3:48 am by ShawnHendricks1,590 pts.