A few years ago I gave my son a Dell Computer that was one I bought from the company I worked for before I retired. It is an Optiplex 970 or something along that line. My son rarely uses the computer but it has worked well for the last few years till now. It will boot to windows but once there is asking for the product key. I have typed in the key as it is on the desktop but comes back and tells me it is an invalid key. I have tried several times and keep getting the same error. Someone suggested I download a version of win 10 and that can be done free but I can't get his computer to even get on the internet, I am guessing because it is saying the key is invalid? I know win 7 isn't supported anymore and wonder if it is there way of trying to get us to upgrade. Does anyone know any work arounds for this problem? Thanks for any help.