Grant Fritchey digs into the difficulties of tracking CPU usage on machines:
There are a bunch of ways to look at processor usage. The simplest, and probably most common, is to use the Performance Monitor counters such as ‘% Processor Time’. Query this, you can get an average of the processor usage at a moment in time.
Ta-da! Fixed it. I thought you said this was hard Grant.
Spoilers: that didn’t fix it.