Bex89,
Do you have another computer?
It would be a good idea to have anotgher computer that you can use to verify observations. In general, a desktop PC will give better results tahta laptop. Often yu can buy a critified reconditioned desktop PC for a very low price. In your area yhou might find a monitgor for a lowprice. Otherwise, monitosrs are expensive to ship.
Having two computers with the same OS lets yu experiment with settings to see how much the OS is part of a problem.