Hi there, What I just realized is that the disc in that link I tried was disc 484073-B21. There is another disc for the HP Compaq dc7800 named 484073-B22. That might be the disk that is needed for the recovery to work on a dc7800 SFF model. If anyone has it then could it please be uploaded if someone were to ever need it? Kind Regards, ComputerGuy12.