Problems with Kaspersky
Kaspersky is known to cause problems. It interferes and makes the Live Processor and other units invisible in Live.
The workaround described below has been proven to help.
Go to: Settings -> Additional -> Network
and Next to "Monitor selected ports only" Press "Select"
You see that port 5000, which the NAD and other units uses for communication with Dirac Live, is active for "monitoring".
If you disable that it should work: