How to Resolve the problem "This copy of window is not genuine" in window 7

When we are using window 7 pirated version. Then some time it will automatic the screen will black and it show the error message like showing in the image.
show that time we use a software so solve this problem.
The simple solution of this problem is use this software that is WAT REMOVER.
You first download this software
                                                                 Click