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.
I did bring over my all-in-one desktop yesterday and checked the direct connection, the Ethernet connection, and at least that works fine.If that does not help, then consider uninstalling the Wi Fi netcard.Also, make sure that you are using WPA(2) Personal (PSK) for both the Comcast gateway, and for the Wi Fi client that you are setting up; don't try to use "WPA-Enterprise" or "802.1X" security because that almost certainly will require resources that you don't have (resources such as a security certificate for that connection).I recently bought a new Linksys wireless router and after setting it up with basic WEP security, I tried to logon from my laptop and was successful! So then I tried to connect from my desktop computer that has a wireless USB adapter attached to it and I ended up getting this error message: Fabulous! I checked my settings on the wireless router to make sure I didn’t accidentally setup certificate security, but found no such thing.Also, since I was able to connect from my laptop with no problem, it led me to believe it was something wrong with my desktop.What's really strange, now I noticed, that this problem is occurring with any Network in range on the list. Without actually looking at the system, it is hard to tell exactly the problem but here are 2 general things to explore: Did you by chance install any of the Comcast utilities on her machine?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.When I put the CD in the computer, and after getting the Starting installation wizard message, a software setup screen then comes up with Select components.2 boxes with check marks on them. I told her that if we don't get this darn thing resolved before Sunday night, I'll just return it to Comcast and try another one. If the modem and the computer are within reasonable proximity, connect them with an ethernet cable.First box says Hardware enabling driver, second box says Software applications. I was happy to see that, when I accessed her wireless network, instead of almost instantly getting the [endless] certificate/Validating routine, I got that familiar opening of the box (Wireless Network Connection) with Type the key, and then click Connect. Disable the computer's wifi adapter and enable the ethernet port and reboot the computer. On the left side you will see "Change order of preferred networks" click on it.In this window make sure you are in the "Association" tab.You will need to enter your encryption information here in order to connect to your network.