I specifically remember buying my copy of windows from the official site. It's not an issue with me or my computer. Also I have just spoken to a friend who uses this on cracked windows so that's not an issue. But anyway, I can see that this hack is not going to work so I guess I just wasted money (nothing new). No wonder it's so cheap. Thanks for the help, but I will sadly not be coming back for such a low-quality product. Have an outstanding night!