I have never had to give a bad review to any product from amazon until today.  I purchases a refurbished computer for my grandson birthday which is this Friday.  After unboxing and attaching all cables I turned it on today and nothing.  Will not open up to anything  just a error message that says disc error, replace and restart. I don't even know what that means so I looked it up and it said it could be bad cables which I replaced. Still error message. Called support and they needed a serial number which has been scratched off the back. So I guess without this number I will be keeping it and will have to get my grandson a other gift.