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Latest Articles

Why does my WMI Microsoft SQL Server 2005 sensor not work anymore?
This article applies as of PRTG 26 After a Windows update, the WMI Microsoft SQL Server 2005 sensor does not work anymore. What is the reason for this? Deprecated sensor type WMI Microsoft SQL Server 2005 With the latest updates of SQL Se...
Thu, 30 Jul, 2026 at 10:25 AM
The signature of my PRTG server is not valid. What can I do?
After an update of PRTG, PRTG Server.exe does not start anymore. At the end of the installation, when the PRTG services try to restart, I get the following error message: PRTG Webserver could not be started properly. Signature of C:\Program Fil...
Wed, 22 Jul, 2026 at 8:44 AM
My Event Log sensor ignores changes in the event log. What can I do?
This article applies as of PRTG 22 Customize Windows event log monitoring in PRTG by setting status filters and event source criteria for Event Log sensors, ensuring accurate and efficient monitoring. Event log sensors: Setting cor...
Wed, 22 Jul, 2026 at 8:44 AM
How do I activate Message Queuing in my Windows installation?
This article applies as of PRTG 26 How do I activate Message Queuing in my Windows installation in order to use the Windows MSMQ Queue Length sensor? MSMQ Message Queuing To use the Windows MSMQ Queue Length sensor in PRTG, you need to ...
Wed, 22 Jul, 2026 at 8:44 AM
6520 ProbeWMI> Error in TOctWMIConnectionList
Hello Team, we have the following problem: repeated increased CPU load by the PRTG Probe, on the PRTG Probe Server after a reboot. We have analyzed all logs and found the following error message in the ProbeWMI LOG: 6520 ProbeWMI> Error in ...
Tue, 5 May, 2026 at 9:21 AM
What antivirus exceptions should be in place for PRTG?
Need to know what folders/files/services I need to exclude from real-time protection so the antivirus product I am using doesn't affect the performance of PRTG. Thanks for any help you can provide. Article Comments Hello, the PRTG prog...
Tue, 5 May, 2026 at 9:07 AM
What is the script that allows you to execute SSH script using an EXE/Script sensor?
This article applies as of PRTG 26.x.119 Introduction The following script allows you to execute SSH script using an EXE/Script sensor. It will connect to the server, execute the given command and simply return the output to the sensor. Th...
Tue, 21 Apr, 2026 at 2:35 PM
How do I run PRTG under a different Windows user account than the local system account?
This article applies as of PRTG 26 How can I run PRTG under a user account with reduced privileges for security reasons? What are the minimum privileges required for such an account? Run PRTG under a different account than the local system...
Tue, 31 Mar, 2026 at 10:10 AM
PRTG Custom Map Object
Good morning, I want to design a new map inside PRTG to create an overview over the server room. now I want to create icons for the different server racks we have. In those server racks are of course multiple machines that are all being monito...
Mon, 30 Mar, 2026 at 12:19 PM
PRTG APi - get sensors notifications details
is there way how to get notification details of a sensor using PRTG API? I would like to see who will be informed when sensor goes down - which group will be notified for example If not API - is there another way like report which could give m...
Thu, 12 Mar, 2026 at 3:26 PM