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

WMI Sensors will stop working



There are several Win7 Ultimate endpoints configured with WMI sensors. They will work initially but over time the same sensors will fail with "Connection could not be established (code: PE015)". Researching this error directed me to run the Paessler WMI Test utility against the affected endpoint. I performed this on the host running the probe. The results seem to show normal results.

Restarting the server or PRTG will clear this condition however as before, over time the problem will occur again.


prtg sensor wmi

Created on Nov 30, 2018 6:08:55 PM

1 Reply




You can send us the log files from your PRTG so that we can have a closer look at the WMI sensors settings. Please open a support ticket and we will continue troubleshooting there. Please refer to this KB article in the ticket.

Thank you

Created on Dec 4, 2018 7:55:22 AM by  Isidora Jeremic [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.