The final answer as to whether you can install a higher res screen in your laptop will depend on the motherboard, graphics, and other insides originally installed inside your laptop. Maybe you can install a higher res screen and attendant other parts, but probably you cannot. If, for example, you and your cousin both have the same model laptop from the same company, and the company offered the option to buy a higher res screen at time of purchase, then -maybe- you can install a higher res screen in your laptop. And maybe this would even be cost effective. In this specific case, different versions of the same model of laptop would have been originally designed to work with either resolution of screen, so it -might- be possible to swap out the parts necessary for the function of the lower res screen with the parts necessary for the function of the higher res screen. This is a pretty specific example for a limited circumstance. (And I can't think of any real life examples right now.) Probably the insides of your machine will be too different from the insides of your cousin's machine to make the change. Better save your coins for a new laptop.