#842 The machine is not on the list

Possible causes:

• Firewall settings.
• The router blocks or loses multicast or UDP packets.
• The operating system of the PC is old (may occur at the same time as error 802). 
• Conflicts with other software.
• The machine IP changes.

Solutions:

1. Turn off the firewall temporarily (especially if you use 3rd-party firewall)
2. Update Windows to 10 or above; update macOS to 10.13 or above if you use Apple's laptop.
3. Check router settings if you know how.
4. If the machine IP is changed frequently, and you need to re-add it every time you use it, you can set a specific IP for the machine's MAC address in the router settings
5. If the above methods don't fix the problem, we're here for you. Reserve a Free Remote Assistance service to troubleshoot the problem.