hi I bought a second hand IMac OSX 10.8.2 several months ago , to be honest I can only remember putting a password on for my wireless internet. I am trying to open adobe reader and it keeps asking for my password which I can't recall. Unfortunately no discs came with my IMac. I was advised to buy Mac OSX install discs , which I have since bought. However , when I try to re-install so I can reset my password , it keeps requesting my password to allow me to do this. Can anyone give me a simple solution on how to reset my password. Many Thanks , Roberta.