Larian Studios Forums Divinity - Original Sin Divinity - Original Sin - Technical Issues Poor Performance - CPU usage stuck at 18%

My game is shuttering heavily, while the CPU is stuck at 18%. I have tried various resolutions and graphics settings, and they make no differences. I double checked to make sure my CPU is not throttled. Here are my specs,

2.3 GHz Intel Core i7
8 GB 1600 MHz DDR3
NVIDIA GeForce GT 650M