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Aug 20, 2012 12:43 PM in response to mtngmaby baltwo,ASC is the correct place for user-to-user support: however, for ML, try their forums. For the hostname, System Preferences->Sharing->allows setting the name. That message usually indicates another computer's using the same name, so you'll have to search your network for another machine using the same name.
Alternatively, http://www.apple.com/support/ for Apple's pros.
BTW, these might help:
Basic Tutorials on using a Mac,
Mac 101: Mac Essentials,
Mac OS X keyboard shortcuts,
Anatomy of a Mac, and
MacTips.