As far as I read your Process Tracker screenshot...that CPU is idling for about:
- 54+23+18 = 95% of its processing time on your 1st 5" window tracking.
- 51+22+17 = 90% of its processing time on your 2nd 5" window tracking.
- 51+22+17 = 90% of its processing time on your 3rd 5" window tracking.
so it looks like quite normal.
Also consider that the show CPU screenshot you attached shows the CPU at 97.8% idle (doing nothing...basically waiting for processing) so, again, all looka apparently normal (non idle processes are, as you can see, those named Sessions & I/O, Hardware Mgmt, IP Host/Routing and System Services).
Forgot to say that, if it was the case (I doubt), the Switch Encryption Keys generation task, running during the Switch initialization, belongs to the System Services task/process's group so it's easy to see it running at beginning.
Remember to disable the process-tracking feature once you're done.