Hi!
I have fresh installation of BD IS 2012 and I've notice exacly the same problem.
When I opened the "Device Manager" (Win+R and type devmgmt.msc), I noticed two of the same devices named "BitDefender AVC HV". As you see below, one works fine and one of work improperly.

The detail of the device driver tab like this:

Maybe this is the reason that there are two identical devices in the system?
Waiting for your answer and solution to resolve ours errors.
Rgrs,
Scottie