I just upgraded from 14.2.something to 18.104.22.1682. Four existing working sensors based on "Hyper-V Virtual Machine" now fail with the following error.
WMI: Access violation at address 00AC8880 in module 'PRTG Probe.exe'. Read of address 0000000C -- PerfCounter: The handle is not a valid PDH object. (Performance Counter error 0xC0000BBC)
Other WMI sensors on the same host work just fine. I've tried restarting the Probe service, but that didn't work.
I've also tried adding the sensor back again, but when I go to do that, none of the virtual machines shows up in the sensor creation panel, so I can't create any sensors.
Remember, these were sensors that were previously working prior to the upgrade. All I did was upgrade the probe software and they stopped working.