How do you load software on this unit?

Of course, Hitachi is "required" to provide the information to you, so you should talk to their regulatory department to request the information. If they don't refuse to provide the AIAT info, write a letter of complaint and copy the FDA. The regulatory manager for Hitachi America is Douglas Thistlethwaite and the phone number is (800) 800-3106. Your district FDA office for Indiana can be contacted at (313) 393-8100. (The FDA doesn't list the names of Compliance Officers anymore, so you have to call to get the name and address.) Another idea is to call the rep from whom you bought the unit, unless you bought it after Hitachi decided to go direct in the USA (6 or so years ago). The former sales reps, most of whom now sell for Medison, typically have some service person or company they use for service. They might not help other than offer to come do it for you at their prevailing rates, but it is worth a try. If that doesn't work, Axess Ultrasound can probably help; (800) 248-4153