Arirew

Hello guys, lately my CPU performance decreased so badly and whenever I try to play a game my CPU usage becomes %100 however as you can see from the Images the GPU usage is about %10. It used to work great but like I said lately It decreased so badly, I tried everything. Could any of you guys help me about detecting what is wrong with the CPU? CPU: i5-6400 GPU: GTX 1060 6GB Motherboard: Asus B150M-C Ram: 16GB