Car-O-Data update DVDs are published 4 times a year. They will update your system and should be run EVEN if the system has an internet connection. They are numbered Year-quarter. It will install thousands of pictures and datasheets must faster than it would over the internet. It will also update the program (if needed). In some cases after the program is updated, it may ask you ask for the lock up code. This is the 10 digit number that is emailed to you after your yearly payment.