I am evaluating PRTG Network monitoring and it seems really good except for the false alerts. We get a lot of "Connection could not be established (Port Error : RPC Server not accessible. -) (code: PE015)" and five minutes later it is fine. We see this specially at night when the backups are running. I set the scanning interval to 5 minutes and Windows Compatibility Options to WMI only.
I have also seen several alerts like this: "Sensor stopped due to WMI lockup. Can be restarted with pause and resume. If not, please try restarting the probe. (code: PE055)".
What else can I do to avoid false alerts?
Also, how can we stop the alerts about sensors paused by dependency and resume by dependency? The way I see it, the reason you set up dependencies is to avoid a flood of down alerts, but then you get a flood of pause by dependencies alerts, so what is the point?