Intel X710 not working once WIM is loaded with WIMBOOT

[NiKiZe]

(2018-08-17 23:34)pxe_curious Wrote:  Even if the same WinPE, when loaded from a USB stick, does not exhibit this issue and everything works fine?

Yes because when the nic is used by anything internal states are changed.
If those states are not reset by the windows driver than you might get failures.

Did you try latest git master and the ipxe.efi build which have native drivers for the x710 nics?