How to Reset a Network Passwordby Stephen Lilley
When you give your computer network a password, you're setting this password on your router and not your computer. This password prevents unwanted individuals from being able to connect to the router, which in turn makes it impossible for them to access the computers connected to it. If you've forgotten the password you've given your network, you can simply reset your router to roll the password back to its original default setting.
Turn your router around so that the rear panel is facing you.
Locate the tiny button labeled "Reset." This button is circular in shape and very small--too small for a human finger to press.
Get a pencil, pen, paper clip or any other small object with a tip small enough to press the "Reset" button on the router.
Use the small object to press and hold the "Reset" button on the router for 30 seconds. This will restore the router to its original factory settings, password and all. You can now use the CD-ROM that came with your router to reconfigure it and set a new password for your network.