I work for a school who has 25 Imacs. Even though computers isn't my specialty, I'm a lot more tech savey with Windows base pcs than Apple. Our ex computer teacher evidently password protected each Imac, with an admin username and password, which makes it almost impossible to install any software with out them, which I don't have! I contacted him and he can't remember the password! So he says! LOL. Anyhow, I believe there is an option to reset it, but would I have to reinstall the operating system for each one to do that? Also, I just installed 2 Netgear 600 routers which replaced some old apple routers we had. The install went well, however, I can't print to our HP 2600n printer wirelessly! I can print if I hook up a USB cable to each one, but somewhere the config or something is not right? Any ideas?