You don't recover Administrator passwords unless you hack the computer and we can't tell you how to do this. Have you tried a blank for the password? Chances are none was setup. If you have administrator rights with your login then you can login as your self then right-click mycomputer -> goto Manage -> goto Users -> Right-click the Administrator and reset the password. Other wise you will have to Google key words like Kon Boot or Rainbow tables to learn how to hack your computer.
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