First, restart the Xbox. Then, try to put the disk back in. If that doesn't work, uninstall the BlueRay app and install back on again. Then, try putting the disk in.
Since you are downloading games from the Steam servers, you have to have an internet connection. If your Wi-Fi is poor, check if you have an ethernet port on your...
He comes and goes because you let him. He realizes that this is a pattern that you accept in your relationship with him. This will continue until you start to...