Peterff wrote:
Download the update, read the instructions, follow them carefully, I would recommend using a cable connection, but it is much simpler and less scary than it sounds. It is also a very good idea. Be patient and let the process complete. Once completed you'll probably wonder why it felt intimidating!
Good luck, but it isn't a big deal.
The first time I updated my Fuji camera the tech at Fuji walked me through it over the phone. Ask A tech at Canon to do the same.