Resetting to factory and product code.
I recently purchased a used table. Everything works, and I can login under the previous account and use everything. I would like to reset it to factory to set the table up under a new username and password, and remove from the old domain it is on. I read through the factory reset instructions, and it seems straight forward, but I do not have a product code. Is the code saved somewhere in the setting or is there a way to retrieve it?