Datasource to monitor Windows Services/Processes automatically?

It's funny, but my lab windows box is unlicensed, so i have about an hour to test stuff until it shuts off. Not a big deal to turn it back on, but it's making things slower. The first thing I did was convert PercentProcessorTime to a counter. That changed the values such that I'm now getting the delta between the current value and the previous poll's value divided by the time between them. So, theoretically, the resulting number should be pretty close, just needs to be adjusted to convert 100s of ns/s to unitless (%). Should mean just dividing the PercentProcessorTime (as a counter) by 10⁷.  Got that in now and i'm going to let it bake to see if the results make sense.