I had to reinstall windows 10. What happened was when I logged in it would go to a blank screen with a window that said CMD.exe or something like that. Now that I restored Windows, Windows is working good. But my games on Steam aren't installed, and still my harddrive space is used up. Why is my harddrive space used up if my games aren't installed? I need to install games but I can't because my harddrive space is used up. I haven't tried installing games on Steam but I'm not sure what's going on here.