i am using lenevo 20079 intel celeron 2gb ram with windows xp sp2 with atheros AR9285 wireless adapter.i never had this problem earlier but now suddenly this issue arises.
Uncheck "The key is provided for me automatically" and enter and confirm your Network key.
Transport Layer Security (TLS) – and its predecessor, Secure Sockets Layer (SSL), which is now prohibited from use by the Internet Engineering Task Force (IETF) – are cryptographic protocols that provide communications security over a computer network.
Several versions of the protocols find widespread use in applications such as web browsing, email, Internet faxing, instant messaging, and voice over IP (Vo IP).
Websites are able to use TLS to secure all communications between their servers and web browsers.
Found this; "Try the following: First, click on the wireless icon in your taskbar and under Related Tasks, choose Change advanced settings. I just use a disc slip-streamed with a computers drivers. But if neither wired nor wireless works them you may have to bite the bullet.
Now click on the Wireless Networks tab and select the network in the list at the bottom. For Windows XP you do not need to boot from a USB drive. I have worked long hours on problems like this which only resulted in a System Reload to solve it.
Step 7 Select the Association tab and uncheck the “The key is provided for me automatically” box, then select Network Authentication & Data encryption and type in the Network key according to the wireless settings on your router.
Are you receiving an endless "Validating Identity" connection status when trying to connect to a wireless network.
If the Enable IEEE 802.1x authentication for this network box is checked, it will trigger the “unable to find a certificate to log you on to the network” message because Windows is looking for a certificate but your wireless router is not set up for certificate security.
Step 6 Select the Connection tab and check the Connect when this network is in range box.
You will need to enter your encryption information here in order to connect to your network.