How to fix Farming Simulator 25 stutter on Biostar B350ET2?

My farm hit 500 acres and the simulation started stuttering badly. Restarting the system only gave temporary relief. I used the GamePP Process Priority Manager to set Windows Update service priority to Lowest. The GamePP Frame Rate Monitor showed the average frame rate rising from 30 to 45 FPS, with single-core CPU usage dropping from 95% to 70%.