Select your encryption type from the "Network Authentication" and "Data Encryption" drop downs.
Uncheck "The key is provided for me automatically" and enter and confirm your Network key.
I thought that at first, perhaps, a virus and/or malware somehow got by and changed/altered the wireless settings, though the antivirus software and Malwarebytes software is up-to-date and is showing no problems. One of these may be doing strange things with the connection. If that does not work it could be a newtork card driver issue. However, before you do that I would advise you to make sure that you have the driver disc for that netcard (or for the notebook if it is an internal Wi Fi netcard), because Windows will often not have built-in drivers for any given netcard.
One way to restore networking, especially wireless, is to go into control panel, system and delete the network card. Since you mentioned that this notebook had previously been setup for multiple wireless profiles, my suggestion would be to delete all existing wireless profiles and see if that allows you to then create a new profile for the Comcast gateway.
Abstract This article describes the tools used to troubleshoot a Microsoft Windows XP or Windows Server 2003-based wireless client, a wireless access point (AP), and the Internet Authentication Service (IAS) when using Institute of Electrical and Electronic Engineers (IEEE) 802.1X authentication for IEEE 802.11-based wireless connections.
This article also describes the most common problems with IAS authentication and authorization, certificate properties, and the process of certificate validation for both wireless client and IAS server certificates.
cheere Hadn't read all solutions so I apologize if I'm repeating someone but all I did was go back to Belkin router setup utility, or (192.168.2.1) and clicked "wi fi protected setup".
Then, I selected disable at the "wi fi protected setup (wps)" option.
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.
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.
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.