Don't know exactly what has happened to my computer. I have two sons late teen and one mid twenties. I purchased the computer with windows home premium did the pro update, purchased windows 8 pro and have run the windows 8.1 preview. tried to start the install for windows 8.1 and have a message that the software has been used too many times. its me trying to find out what has happened. I have done the sfc /scannow several times, i was just able to open it...
HP Pavilion p6-2127c Desktop PC