Wrt110 validating identity error
Try connecting computer to router by ethernet cable -- if it then works, it's a wireless problem, possibly with wireless security.
Try again with wireless but with wireless security disabled in the router.
If that works, have another look at how you set the router's wireless security settings and the wireless adapter/computer wireless security settings.
Click "Properties" then open the "Authentication" tab.
UNCHECK the top box "Enable IEEE 802.1x authentication for this network".