where do I get Downloads for Sony All in one please?

Sony have just hit me with a bombshell. I have a Sony Vaio AllInOne PC, less than 3 years old, the 250GB hard drive failed, so I fitted a 1TB hard drive, reinstalled Windows Vista, tried to install the download graphics, ethernet, wireless, etc, but nothing works. Their downloads only work on the original drive. The PC is fixed to only allow the original hard drive to work in Windows. Does anyone have a solution to this please? It just seems they do not want you to fix it yourself.