Good Morning everyone.

I've tried to add the sensor "Event Log (Windows API)" to a server, but unfortunately I've receive the error "System Error. Code: 5. Access is denied". I've read many KB, but I don't find the solution. The WMI Credentials are correct and for the others sensors, I don't have any problems.

Destination Server (that I want to monitor) is a Windows Server 2019.

Thx for any help and wish you a good day, greetings :)

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Attention: This article is a record of a conversation with the Paessler support team. The information in this conversation is not updated to preserve the historical record. As a result, some of the information or recommendations in this conversation might be out of date.

Hello,

We have received many inquiries about exactly this error in the last few days. Our developers are currently analyzing this issue - but I'm afraid we might not be able to solve it from our side, as the problem is caused by Windows updates. It's also mentioned as "Known issues" here:

- https://support.microsoft.com/en-us/topic/june-8-2021-kb5003694-security-only-update-68434340-6259-4adb-899a-2c3e117f4501 - https://support.microsoft.com/en-us/topic/june-8-2021-kb5003646-os-build-17763-1999-81e2ff5a-0769-4e56-8762-059dd6e0d6bb

The only known solution would be to make sure that both servers (PRTG Probe and also the monitored target device) have the latest Windows updates installed.

- So please double check that all updates are installed on both servers
- Alternatively, you could also try uninstalling the affected Windows updates again.
- Instead of the "Windows API" sensor, you could also try the WMI based alternative. The Windows updates should only affect the logging API, but not WMI.

Kind regards
Felix Wiesneth - Team Tech Support


Jul, 2021 - Permalink