|I'm not sure how it is with windows 7 but with xp the administrator account is not password protected unless you add one yourself. So you can usually log on as administrator and then delete the passwords on the other accounts. Maybe 7 has closed that loophole but you can certainly give it a try.|
Or, do you know if the laptop's drive has a restore partition? If so you can boot to it and then restore the original OS.
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