Hi,the processor is Core i3 5th generation for laptop. So I want to clear first of all, This Problem exists in Windows 10 and not on Windows 7. The Problem is that when I'm playing any game which demands high CPU usage for AAA titles on a Core i3 dual core 2.1MHz Processor, the CPU usage for first couple of minutes is above 50%(70~80%) but then suddenly the CPU usage gets stuck at 50 and when I looked at the FPS monitor, I found that One Core stops working temporarily and then suddenly both cores start working and then again another core stops working Causing Lag in Games like GTA V. However this problem doesn't occur in Windows 7 so there is no question that my Cpu is weak as in Windows 10 when the CPU usage is above 50, there is no lag or stuttering in game. I'm also attaching a screen shot of GTA V and please look at the right corner for CPU usage(Sorry for bad Image Quality). Please Help me, I'll be grateful. Also I had rebooted my laptop completely and reinstalled Windows 10 but still the problem exists for me.