My system handles  a pretty good load for all of the addons I have.  All of my aircraft have never interferred with the frame rates. However, today I was starting a flight with the CS 757-200 and immediately got a msg in my browser to update.  I looked at the update number and noticed it was one I had already appllied. But the browser notification kept popping up.  Thinking there is probably a newer update but with the same number, I downloaded the update and applied.

Now while on a flight to KLGA (which New York is heavy on frame rates anyway) my frame rates went down to as low a 6 fps which meant I could not control the aircraft manually.  After crashing on the runway.  I decided to test my other aircraft.  All aircraft perform at 40-50 fps except for the CS 777 which was around 30-33 fps.

I am stumped. 

Additionally, I notice as soon as I tried to taxi the aircraft it wanted to taxi a a very very fast pace.  Breaks would hardly stop the fast taxi.

Again, stumped after I installed a required update.