Hi there

For people using the CU update as a VM - SWITCH OFF the setting Turn Monitor off -- I.e set it to NEVER and allow the HOST to control the main screen otherwise you'll have to login again with password - nuisance if running file sharing services etc

The Host will handle your Monitor switch off -- the VM will then still be continuously active.

The Monitor hardware can also sometimes be used instead -- for example there's usually an "Energy saving mode" which will switch off the screen if inactive for 10 mins or so -- this won't stop the Host or VM from being fully functioning.