Help - I am trying to dowload adobe air, but I keep getting error message #0

For an issue like that you should either call the Apple help line or (and this is the option I use most often, and with good success) go to apples support page. There you can search for answered questions and if you dont find an answer then you can write a question and hope it gets answered. There are many people on that page that are quite good at trouble shooting and suggesting fixes. To find the support page go to apple.com and in the upper right side of the tool bar of Apples page theres the word support, the rest is easy. Good luck.