WDS PXE boot fails with Dell Precision 3460 and AIO 7400

The reason boot.win doesn’t boot is because the Dells are too new and missing network drivers.

Solution: install the following network drivers from
​https://www.dell.com/support/kbdoc/en-us/000109842/dell-command-deploy-driver-packs-for-precision-models

Very important: after adding three drivers in wds, and enabling them, do not forget to right click on the boot image and add the drivers there, so the boot image to rebuild including the network drivers.