Originally Posted by
markg
Actually you could try this. From a command prompt type in IPCONFIG and press enter. Look for the IP address of your default gateway, most probably this is going to be your wireless router. Then from a browser window enter http:// followed by the ip address of your default gateway. Now if you get a login screen, as D4WNO has suggested, take a look at the bottom of your router as some list the Admin username and password. If not download the manual for your router and the default username and password should be listed. If you can get it to log in, assuming it hasnt been changed (you will be supprised how many people dont bother) then you can reset your password for wireless access.
This is assuming your on Windows and not Linux or Mac OS.