Have a look at this tool from Sysinternal https://technet.microsoft.com/en-us/sysinternals/ff700229.aspx
Missing nic driver in winpe boot image?
This is the best guide EVER http://www.niallbrady.com/2011/08/31/missing-nic-driver-in-winpe-boot-image-no-problem/
Start Enpoint Protection from command prompt
“C:\Program Files\Microsoft Security Client\msseces.exe”
SCCM client on Windows Core
To open the SCCM client control panel run the following command from the command prompt: %windir%\CCM\SMSCFGRC.cpl To Open the Software Center run the following command from the command prompt: %windir%\CCM\SCClient.exe