To resolve the machines displaying in the console without hostname and as 300 client version, try the following on the affected PC's showing as v300 


>Open Services.msc on the client

>Stop the Impero Client service 

>Stop the WMI service (winmgmt.exe / Windows Management Instrumentation)

>Navigate to the following directory - C:\WINDOWS\system32\wbem

>Rename the Repository folder to Repository.old

>Start the WMI service (winmgmt.exe / Windows Management Instrumentation)

>Start the Impero Client service