If that works, have another look at how you set the router's wireless security settings and the wireless adapter/computer wireless security settings.
Open your "Wireless Network Connection" where it displays the available wireless networks. Now go to "Wireless Network Connection properties", and click the "Wireless Networks" tab.
If you receive a "Limited or No Connectivity" error for your network connection then your network is most likely encrypted and you need to repeat steps 1-3 and go on to step 6.
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.
Are you receiving an endless "Validating Identity" connection status when trying to connect to a wireless network.
In a few simple steps you can bypass Windows Validation, and the resulting "Limited or No Connectivity" issue on an encrypted connection.
This assumes you are NOT using any authentication at all.
Double Click the offending "Validating Identity" icon in your system tray.In the Following "Wireless Network Connection Status" Window click on Properties In the Resulting "Wireless Connection Properties" Window click on the "Wireless Networks Tab." In this window then click on Properties for your preferred network.In the next window click on the "Authentication" tab, Make sure "Enable IEEE 802.1x...." checkbox is UN-Checked, the rest of this window should be greyed out.If your network is Encrypted go on to step 6 otherwise Click ok and try to connect to your network again.
Click "Properties" then open the "Authentication" tab.UNCHECK the top box "Enable IEEE 802.1x authentication for this network".