This message was posted on behalf of Intel Corporation
Thank you very much for the pictures, they are very useful for us to better assist you.
Based on that, in regard to the DirectX diagnostic tool, it is expected that shows Intel® family, that is how the tool shows the graphics information.
Now, on device manager, in order to check the graphics, you need to select display adapters, and you will be able to see both graphics, and in there you should see the Intel graphics version.
One of the things we can try is to un-install the current graphics driver, by getting into device manager, select “display adapters” then right click where it says Intel® HD graphics and select “uninstall”
Then we can try to install the driver manually.
Instructions to install driver manually for Windows® 8 and 10:
Instructions to install driver manually for Windows® 7:
This is the latest version of the graphics driver for Intel® HD graphics 4400 controller, which is 4501:
Now, just to let you know, since the manufacturer of the laptop is Dell, sometimes the laptop works or supports just the drivers provided by the manufacturer, so, you can always try the graphics driver from Dell, look for the one that says video:
Also, Windows has its own graphics drivers, you can install those by removing the current graphics driver same way as it was mentioned above and doing Windows update.
In regard to the question about changing the Intel driver to primary, that is also something to check with Dell directly, because depending on the laptop you can try that in Windows or in the BIOS, so, for that it is always better to check with the manufacturer of the laptop:
Dell’s phone number: 1 800-624-9897
Dell’s web site: http://www.dell.com/support/home/us/en/04
On the following link you will find additional information about switchable graphics:
Any questions, please let me know.