[CLIENT] Hardware questions.

I have recently started noticing that whenever i start League client my computer immediately starts full usage of the fan. Even to the point of my computer almost overheating. This didn't happen before and im worried that it might hurt my computer on the long run. Any idea of what might be happening, because it starts almost always when i start client and gets a bit worse when the game starts. (Again, this didn't happened before, i think it started after they updated launcher but not exactly sure.) Thanks.

PS. Im concerned about the fan more than all, i can almost feel it breaking sometimes. So i immediately stop.