What's your hardware? Did you customize any portions of Theme?
After a new os-installation and encrypting again. I got the same issue. Seems like there is a problem with this hardware. Other Laptops don't have this problem.
We just switched the backgorund picture (based on the McAfee Theme). But the change is not active. I have still the McAfee background.
What is video card in that laptop? ATI or nVidia models had some issues. What is OS version?
Try to change EE product policy and remove checkmark from "Always enable USB pre-boot support" in "Boot Options" tab.
Then deploy EE again (to freshly imaged laptop).
"Try to change EE product policy and remove checkmark from "Always enable USB pre-boot support" in "Boot Options" tab."
seems to be the solution.
A freshly imaged laptop get the error with this policy enabled, with disabled it works.
What are the consequences now? I thought I need this policy enabled to support USB-Device like mouse, keyboard,...
It looks like I need a second policy for this types of systems.
EEPC version 6 is not immune to the problems that were present in 5.x. So look for USB handback issues in McAfee KB.