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If you have a laptop running XP that is able to connect to a wireless network fine, but you don't know the password it's using, is there any way to find it out so that a second laptop can also connect?

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up vote 7 down vote accepted

Run Nirsoft's Wireless KeyView on the laptop that can connect.

Failing that, connect with a cable, and try to connect to the router's interface (your default gateway address, often, check the manual), and try to login with the default passwords (google or check the manual).

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You may be able to connect to the router's management interface via the wireless. Default username/passwords are usually "admin/password", "admin/admin" or "admin/<blank>" – RJFalconer Jan 1 '10 at 17:49

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