Preinstalled McAfee Livesafe on new laptop was activated by somebody else

I just purchased a new Dell laptop online that came with preinstalled McAfee LiveSafe software. I clicked on the McAfee icon to activate the software, then I clicked on Account and then My Subscription.  The screen that came up showed that the subscription status was already active and it showed an email address that was NOT mine.  It is supposed to be a brand-new laptop so I'm not sure how McAfee got activated or whose email address it is. Happen to anyone else?? Not sure what to do or how to change the information so that I can set up my own McAfee account and activate my software...