That's Task Manager...Ok, this is weird.
Was browsing the web in "tablet" mode and suddenly the fan started spinning up pretty hard. Huh, I thought, that's weird.
Opened Task Manager to see what was up and saw CPU usage was at 100%! But here is the weird part. It immediately dropped to 17%. Closed it again and reopened - again 100% then back to 21%. So what the hell is happening here? What is churning my CPU to 100% then immediately backing off once I open Task Manager?
Had Access open in the background and Chrome in the foreground. Temps never got above 60C and the infamous Windows Installer wasn't running. Bizarre.
BTW you should change the Update frequency to Low in Task Manager as the default Normal setting is too high for most normal purposes.
Tip #2 Uninstall XTU and other Monitoring apps, they use too many resources, especially XTU. They are just heating up your device and killing your battery life.