How do you know windows 7 is original or not?

If you want to know Windows 7 is original or not on a notebook or computer, follow the steps below:

Open a comand prompt by clicking the Start button, select Run and type CMD followed by the Enter key.
Type slmgr then press the Enter key. This command will not provide any information because the command itself is not yet complete. Windows itself will provide precise information how to enter the correct code.
Now let's take press slmgr / DLI at the command prompt. This command will provide simple information about the licensing of Windows on a computer or notebook.
Continue by typing the command slmgr / DLV on the DOS command. This command will tell Windows to display the details of the Windows license that you're using.
Furthermore, type slmgr / XPR on jendea CMD. With this you can know when the Windows license will expire. If you are using the trial version, Windows will give information when your Windows license expires.

The results of my experiment

But these tips you can use as a reference if you have problems during registration of Windows to Microsoft.

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