SymptomsDevice Manager snap-in shows unknown devices and exclamation marks on devices inside the container:
CauseThis is a cosmetic issue that occurs with older versions of Parallels Virtuozzo Containers for Windows and is fixed in Parallels Virtuozzo Containers for Windows 4.6.
The root cause of the issue is the KSAL (Kernel Services Abstraction Layer) engine of PVCfW, which blocks unused drivers inside containers and results in this behavior.
NOTE: The issue has only cosmetic effects; it does not affect hardware functionality at all.
Parallels Virtuozzo Containers for Windows provides OS-level virtualization; hence, the host system hardware is propagated to containers in the exact same way it is available for the host.