CPU usuage high

Happy New year everyone.

Since today when running the sim my CPU usuage is very high…above 50% sometimes in the 80’s and even 100.

I tried restrting the sim and computer. If I restart a flying session, it is as per normal during the flight it gets worse to the point that all it does is stutter. My memory usage is at 70%. I have not had many issues with the sim, half a dozen CTD since it came out, it usually runs very well.

I have not updated the graphics driver, nvidia.

Any help from someone more knowledgeable would be appreciated.

Thanks