There are two methods to re-start this service that may fix the issue:
1. Uninstall vDisplay Manager, and reinstall it, try to launch vDisplayManager again.
2. Press the “Windows Key + R” to open the “Run” window, and input “services.msc”.
Find “Realtek Hub Wakeup Service”, and start it.
If there is a warning message from a firewall or anti-virus software, please accept it.