You are getting the error ?this copy of windows is not genuine, that means your windows has an updated file which can detect your Windows OS. So before going into the actual procedure, You must uninstall the update which was detecting your windows. Remember, if you see this mentioned update, then only you need to uninstall. If you dont see this update, you can skip this step. Follow the below steps to uninstall Windows update.
-Open control panel. -Go to windows update section. -Click on view installed updates. -After loading all installed updates, check for update ?KB971033 and uninstall. -Restart your PC. If you dont see the mentioned update, you need not uninstall any update. You can leave this step and proceed to the second step.
I uninstalled that update and re started my computer. Nothing happened.