I didn't really check to see what caused this but, for me, there has been no recurrence of the cpu pegging. Guess it's just another Windows bug....

The first answer from: What is the cause of a high CPU usage of 'system and compressed memory' in Windows 10? - Super User appears to work for me.

When looking at the Task Scheduler the...

I've been experiencing this for the last few months also. I've found that putting the system to sleep/hibernate briefly and then waking back up clears the situation for a while. I've tried all the...