CPU idles at 100% no matter what window is open

Unity Engine
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1

At first only the popped up windows caused unity.exe to max out on CPU utilization, but recently even if all windows are docked it causes this strange error.

If I minimize Unity then CPU overhead stops, but as soon as I maximize the window the utilization jumps to 100% instantly even on empty projects.

2

I just found out the solution. In Preferences settings > General > Interaction mode I had it set to “no throttling” and when I changed it to “default” the overhead disappeared.