The HP EliteDesk 800 G1 desktop is based on the Intel 4th generation Haswell processors. You need to make sure the WinPE (in Altiris) or new versions of the Zenworks linux boot code that support these systems. Otherwise, you will have some significant issues. We have driver packs for Windows PE based on Windows 7 or 8 that can be incorporated into a winpe system if you know how to do that
One -no cost option to test - system that works is Microsoft MDT and Windows Deployment Service (WDS for PXE support)