busy playing games

My son was busy playing games on my computer today. I kept asking him to stop because I needed to use it, but he always said for a few minutes. He finally stopped playing a few minutes ago and let me use it. He is having fun playing games online and I do not like it. We only have one computer because the other laptop broke down and he said we need a new one. I hope it is easy for me to buy a new one. I know we really need another computer, but not now. I need to save money for it.