I have a network set up in my house with a wireless router. However, my desktop (MS Vista Enterprise) is and always has been hardwired to the router. Out of the blue the desktop no longer recognizes the network and cannot connect or get online. All other wireless devices work fine. I have tried rebooting the computer, rebooting the router, completing a system restore, none of which have helped. I do notice that in Device Manager that Microsoft ISATAP Adapter #3 is "not working properly because Windows cannot load the drivers required (Code 31)." When I troubleshoot the problem it tells me that Windows is looking for and cannot find a wireless adapter (of which I've never had one).
Any idea what may have gone wrong and/or what I need to do to correct it? I'm out of ideas.