CPU Is always 100% busy while gaming i7 9700k what should you do?

I have an i7 9700k and an rtx 2070super built into my gaming PC and have strong fps drops in Fortnite (60-130) etc. I have noticed that my CPU is always 100% exhausted when I gamble and the program does a stress test MSI Afterburner ran at 100 degrees.

If someone has an idea how I can fix the strong fps drops, I would be happy to hear from you.

That should be a problem in windows. Try reinstalling Windows

There are other options

You can also use windows troubleshooter for windows updates. But it could be that it doesn't get you any further

Thank you