I had been able to connect previously, but the connection would always indicate that it was validating.
This seemed to work for me after I disconnected from my router and reconnected again.
However, you may have to go into "view wireless networks", and then choose "change order of preferred networks" in left corner of screen.
I have a laptop with a Dell D630 with Wi Fi power switch on the side.
Because I have a switch to disable the Wifi power, this seemed easier/safer, and it worked. thanks, Solution: remove whatever "preferred networks" are displayed in wireless netwok card's property page, n click ok. happens when u switch to a new router or use a new different SSID.
After this remove your router from preferred networks list. I had this problem on a laptop (lenovo) which i reinstalled xp on.
This will allow you to pick your router from available wireless network again, and put in your encryption code. I tried all the other stuff like disabling 802.11 settings under properties blah blah ..nothing worked.