About The Topic...

When I Am on my laptop ( Hp, Windows 8, 6 GB of Ram ) and i don't touch my mouse for a about a minute my laptop suddenly becomes MASSIVELY laggy. so then i move my mouse little but then it turns back to normal.

For Example:

If i am watching a youtube video and i dont touch my mouse it my laptop just explodes into laggyness <--- laggyness???, but anyway...

Does anyone know why this happens and or how i can stop it?