Why is my DPM only available after a system restart?

Problem:

The DPM and other dictation devices incl. mass storage devices can only be displayed and used once in the system after a system restart.

Do you use Bitdefender?

Solution:

There is a problem with Bitdefender versions <*-56. Bitdefender has released the update *-56. Please update to this version and then restart your system.

If you are using the free version, you can/must uninstall it to be able to use your USB devices (e.g. DPM).

You can now use your DPM on your system as desired.