My father-in-law Ron is 88 years old. A few months ago he remarked that Linux sounded interesting. Naturally I jumped at the opening. I sent him Ubuntu 9.04.
The first problem was -- you guessed it -- the BIOS setup. His computer was set to boot from the hard drive first, and when I tried over the phone to explain that there would be some boot menu setup key indicated on the first (OEM) screen, it was clear that the screen flashed by so quickly that his eyesight couldn't catch it. I suggested he send me the full model description of his computer, and I'd see what I could find about the proper key.