Prompt for Zenworks login during auto login

Apologize if this isn't the right sub-forum.

I've had an automated Windows 7 image for some time now using MS MDT/WDS. During the imaging process, I set registry keys for edir and AD to autoadminlogin until imaging is done. Recently, when the computer is booting during imaging and autologging in, it get stuck at the Zenworks agent login. I dont know exactly when this started, but wondering if it started when we got some SSD machines in. Maybe the login is processing too fast for zenworks to catch the edir login/password?

If I go to the machine and hit ESC or type in the password for the "install" user.. things carry on as expected.

Not sure where to start on this one :) anyone think of a reason why it would prompt sometimes?