"A connection to the deployment share could not be made. The following networking device did not have a driver installed" - Before booting into LiteTouch x64.

I know this is a commonly asked question. I believe I've followed all the steps within this guide.

"https://social.technet.microsoft.com/Forums/en-US/3e083173-f5db-48e9-b744-f71b9ca6541c/how-to-debug-missing-drivers-in-mdt?forum=mdt"

The machine I'm trying to build is a Dell OptiPlex 7040, I've downloaded the cab file from the Dell Support page, and I've updated the Deployment Share, and then replaced the .wim file. 

I beg any help!!