I just opened up Heroes and generals... a not so cpu heavy game... which i used to run with 200 fps and 50% cpu usage, now i run the game with 100% usage and 60fps with the game freezing alot.... the temprature of my pc hits 70celcius even though it ran with 50 celcius before... why is this happening? do i just need to do one of my routine pc cleanings? where i dust the pc off inside?