ive had my computer for a long time but something happened recently that i dont know whats wrong my C drive is a 200gb harddrive and for some reason after a couple days ago it says i have a capacity of 5gb but when i do a defrag it says i have 5gb capacity and 144gb of free space i dont kno what is wrong with it ive dont disk checks disk cleanups and everything i can think of can someone plz help?