Like I said I tried to delete windows.old to free some space,just when I did my whole PC froze so I restarted my PC then the windows logo would be stuck, I tried using a usb boot but again I am faced with a stuck windows logo, I then tried going to safe mode but it gets stuck when loading windows files on aswRvrt.sys, then I tried installing windows 8.1 but it again gets stuck on windows logo.Any ideas would be much appreciated, because I can't find any solution.