How to make Windows 7 genuine using Command Prompt

How many of you using Genuine windows 7 ?
we all know that everyone can't buy a genuine windows 7, because cost is too high.
Lots of Windows 7 users have experienced the error message that "Windows 7 is not genuine". 
This error message comes if you use pirated or OEM versions of Windows 7.
If windows 7 is not genuine, even you can't change the background wallpaper or any other display related option on your PC.

So now i'm going to show you a easy way to make your windows 7 genuine using command prompt.

How to make Windows 7 genuine using Command Prompt

Press Windows key + R
Now "run" box will appear , in "run" box type CMD 
Click on OK

Note : Run CMD as Administrator 

Now command prompt will appear

In command prompt type SLMGR -REARM
Hit Enter.

Wait 5-10 seconds

Now a message will appear as shown in image below.

Done !!!
Now your Windows 7 is genuine .. :D

Restart your PC once. Hereafter you won't see the warning message that "Windows 7 is not genuine"