Hi @joker1138,
The spacedesk server is set to automatically started upon installation and should be ON always.
It will only be OFF if it was set manually or spacedeskService crashes.
Is it always server OFF on your machine?
For further analysis, could you please send us the following info:
Primary Machine
– operating system (Windows 8.1/10)?
– graphics adapter (AMD/Intel/Nvidia)
– network connection type (wired/wireless/USB tethering/WiFi Direct)
Secondary Machine
– Viewer type (Android/iOS/Windows/HTML5)
– network connection type (wired/wireless/USB tethering/WiFi Direct)