Wireless won't connect
  
 "Validating Identity" 
              and/or"Windows was unable to find a certificate to log you on to the network <network name>"

 Ensure that IEEE 802.1x authentication of the wireless adapter is disabled and check if it helps.

1. Click Start, then select Run.
   
2. In the Run dialog box type ncpa.cpl and then click OK.
   
3. Right-click the Wireless network connections icon, and then select Properties.
   
4. Click the Wireless network tab.
   
5. Click the Properties button beside Remove.   
6. Click the Authentication tab, and clear the Enable IEEE 802.1x authentication for this Network check box.
   
7. Click OK to update the settings.