CheckWindowsGenuine

Building your PC is always a better way than buying it already pieced together. In reality, there are a lot of people who do not have the time to get the information about doing that, or they are simply not interested in hardware configuration.
Buying a complete PC usually comes with the latest version of Windows pre-installed. If you have concerns about the license status, you can check it with CheckWindowsGenuine, a lightweight tool that checks if a Windows license is genuine or cracked.
The utility has no graphical interface or installation process built in. It's a simple CMD agent that requires only to be launched, displayed the data in a matter of seconds.
As for how you detect a cracked version of Windows, well, the app will let you know through a message that contains the word "pirated." Licenses detected as OEM are not pirated, they're just a more basic type, known as original equipment manufacturer licenses.
To sum things up, CheckWindowsGenuine is not an app that you'll use very often, but it's a handy item to have on a USB drive for keeping an eye on your license.