Memory leak?

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