Error on the client "A digitally signed driver is required" requesting signed drivers (4279372)

An error is received on client machines:

Program Compatibility Assistant
"A digitally signed driver is required"

There is a signing issue with the driver included in the Privilege Manager client. Microsoft requires all drivers to be digitally signed in Windows 10 Anniversary Update (Build 1607).The Privilege Manager client's driver issue causes this error to be displayed.

WORKAROUND:
Disable Windows's Secure Boot.

STATUS:
Issue is resolved in version 4.0.5.1. The latest version of Privilege Manager can be downloaded from here.