I understand you would like to install graphics driver version 126.96.36.19990 in your Dell* Latitude E7240 laptop.
Let me apologize for any inconvenience this issue may be causing to you.
What happens is that graphics driver version 188.8.131.5290 has been validated for newer graphics controllers so it is expected it will not install on 4th Generation Intel® Core™ Processors.
This is the latest graphics driver we have available on our website for 4th Generation Intel® Core™ Processors https://downloadcenter.intel.com/download/26544/Intel-Graphics-Driver-for-Windows-7-8-1-15-36-?product=81496
Please try installing that driver, and if issue persists please provide more information about the issue you are having in the computer.