K_C,
Unless you are running a version of the software with which I am unfamiliar - possible - then it is likely that you did have to instill a password to register the software. Of course, remembering it is a different story and hardly the point at this juncture.
The Hard Reset is essentially a structured method of disconnecting everything (as described), then removing the battery (for those models supporting this action), and pressing the power button for varying periods of time in a controlled setting -- Do read the instructions and follow them for your model. You do not need any form of login access to accomplish the reset.
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