آپ have no hope to ever see the computer screen again! The power of the older brother is limitless! He has the ultimate authority over آپ and آپ cannot do anything about it!
یا آپ could tell your parents he's watching porn یا something. That might work.
Do آپ have a fake insect in your room? Like, one of those fake cockroaches and spiders? If آپ do, then grab one and secretly place it on him. He could get up and panic. Then آپ can try kicking him out of the room. xD
Try to lure him out سے طرف کی using something he would be interested in. If this doesn't work, آپ can always mention that to your Parents. If nothing gets done in this case either, welp, tough luck as the authority of an Older Brother is absolute just like it got mentioned before me !!!!
You're gonna have to lure him away. Luckily we know exactly what he likes. Computers. So we're just going to have to leave a روٹی crumb trail of computers leading to a giant rabbit trap with a computer inside of it and then as he's following it, آپ will have your computer back.