Regarding performance, the preference is SNMP, then WMI or performance counters. The same information is often available using any of these protocols. It is also possible to use Simple Network Management Protocol (SNMP) for Windows devices.

If you run into issues with WMI, see the Knowledge Base: My WMI sensors don't work. However, monitoring via WMI is not always trivial and can cause issues. To monitor via WMI and performance counters, it is usually sufficient to provide credentials for Windows systems in PRTG. In addition to strict WMI sensors, there are sensors that can use performance counters to monitor Windows systems. Note that sensors that use the WMI protocol generally have a high impact on system performance. PRTG uses it to access data of various Windows configuration parameters and status values. WMI is the Microsoft base technology for monitoring and managing Windows-based systems. You can monitor Windows systems via Windows Management Instrumentation (WMI) and Windows performance counters.

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