3, one that I havent used for years, its operating system is windows xp. Reasson for not useing: power cable melted, then was unused for 3 years or 5. Got new cable and the comp caused an blackout and melted the cable again. Then the other one was my brothers. It got pumped whit useless shiet until it stoped working and got slow. Reasson for not used: got dusty and overheats so it burns. The 3rd one is the laptop I used recently and the most. It was good, decently fast but I never properly turned it of. I just flipped the screen down. Rreasson for unused: mother board failure. Won't even boot up