I have a copy of windows 7, and 3 computers that need an operating system. I don't even care which one it ends up on. Well, the nicest of the 3 used to have Vista on it. I'm not sure what happened but my husband thought it just needed windows put on... Vista or higher. I put the disk in and when I turned it on it didnt read the monitor or the mouse. The lights on the keyboard will light up for a second and go back of (the regular deal). Anybody have any idea how this could be fixed? The other 2 may be in worse shape. One gives me a missing ndlrt message, and the other one won't turn on at all.