Do you remember the Wireless network key you entered if any? If you have secured the network using the Wireless network configuration OneCare should have adviced in how to perfrom this one other computers giving you several options to follow either to print the instrauctions or save the configuration on a USB device.
If you were unable to perform this you may follow this link which best explains it:
http://social.microsoft.com/Forums/en-US/onecaresecurewifi/thread/2da1b9eb-7de7-40af-9987-8974c0176662.
Cheers!
Crimson Spectrum at http://aiscer.spaces.live.com