Performance Issues

Something is not working correctly. There is a high cpu usage and I am unable to figure out why. There seems to be an invisible ammount of cpu I cannot see? There is only 1 user on the machine and the cpu usage is more than the users cpu usage how does that make sense and how can I fix and optimize the cpu usage?

While i am playing games my computer seems to suddenly turn off i can turn it back on with no problem but it randomly happens every 2 hours ish.

I keep getting a High Resource Usage Detection message even when I haven't got a lot of programmes open, and my laptop gets very hot. I have looked through Auslogics Boost Speed 11 Menu but can't seem to find a tool that may help with this.
Could you please advise which tool I should be looking to use in order to put this problem right.