I am having similar problems. I will list them separately and provide you with the solutions I found and still wondering if anyone has an answer for the problem I have not solved.
Initially I had the problem:
Issue: error that it cannot authenticate.
Answer: I created a local PXE Mapping Account on the DS Server
Added this account into the Permission of the eXpress (Deployment Server) folder
Gave this account Full Control and pushed it to all inherent folder
Added this account to this account the the eXpress Share
Add this account into step 5 of the WinPE
Issue: The HP7900 Desktop will not launch image
It mounts the F: drive but then I receive a message that it can not find the .exe in my image script. All of my other Desktops and Laptops image fine.
Product Name: HP Compaq dc7900 Small Form Factor
I have:
selected SATA and IDE and both fail
let the computer add itself to the console and added it to the console and neither works
Does anybody have any idea what I should do?