What is this?

This knowledgebase contains questions and answers about PRTG Network Monitor and network monitoring in general.

Learn more

PRTG Network Monitor

Intuitive to Use. Easy to manage.
More than 500,000 users rely on Paessler PRTG every day. Find out how you can reduce cost, increase QoS and ease planning, as well.

Free Download

Top Tags

View all Tags

Core Server Service Will Not Start



I have a new installation of PRTG on Windows 10 Pro. I followed instructions per the installation video, but the Core Server Service will not start...it remains in a 'starting' state.

I was able to disable to the service, reboot, and change the web server port from 80 to both 443 and 8888 and select only the IP address of my network card (not the loopback address or the address of any of the virtual network cards), but the service would not start with either change.

I don't know what else to try. Any help would be greatly appreciated.

core-server-service prtg-network-monitor start-failure

Created on May 24, 2017 9:38:42 PM

1 Reply



Hi there,

As a first step, change the startup type of both PRTG services (PRTG Core Server Service and PRTG Probe Service to manually and restart the machine. Afterwards, open the PRTG Administrator Tool on the PRTG host and try to start the service below the Service Start / Stop tab. Is there any error message displayed?

It also helps to disable anti-virus solutions to prevent conflicts while troubleshooting.

Best regards, Felix

Created on May 26, 2017 11:54:45 AM by  Felix Saure [Paessler Support]

Disclaimer: The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.