I came home and put it in the laptop. I then turned it on and got the windows 8.1 DVD disk and put it in. I had it installing and then it said something went wrong and restarted. It turned off my PC and I turned it on and now it won't let me keep installing it. It says"An operating system wasn't found. Try disconnecting any drives that don't contain an operating system." It won't let me install it if I take it out.