These car computer systems would have to be protected like any other computers against malware, spyware, hacking etc. There needs to be antivirus software that ideally can be automatically downloaded to the hard drive through an automatic update system like there is on normal home Pc's. There would also be antivirus software that people could buy and upload to the computers. Hackers are very crafty so there would need to be people constantly monitoring to see what people are putting out there to try and hack into peoples car computers.