All of our clients have RDP disabled (security policy) but it is useful to sometimes RDP to them. This means starting the remote registry service either via
psservice \\machineName start "Remote Registry"
Computer Management -> Connect to another Computer -> Open services -> start the remote registry service.
Open Regedit -> Open Network Registry, enter machine name Go to, HKLM->System->Current Control Set->Control->Terminal Server
Find the key fDenyTSConnections Change it from 1 to 0