Easiest first step is to delete that particular wireless connection on your computer, and start again. Control Panel, Network Connections, right click on the wireless adapter and select Properties, then Wireless Networks, click on your wireless network name and delete it.
Alternatively, switch off network security on both sides and see if you can connect, and if you can then check that the same network security settings are used on the laptop as are required by the router.
I assume there's no MAC filtering being used by the router, though I don't think you'd get that error message.
Last edited by Bushfiva; 19th May 2011 at 23:56.
Reason: LR edits faster than I type. Just sayin'