We have a problem that is re-occuring for about 6 or 7 users. They all have HP laptops (Omnibook XE3, XE3l and 4100 models) running Windows 2000 Professional. It seems that after we install win2k sp3 this occurs to a select few users. All of their network and dial-up connections will occasionally disappear completely. I've searched Microsoft's Knowledge base, not to mention several different forums and newsgroups. I found two KB articles that haven't fixed the problem (http://support.microsoft.com/default.aspx?scid=kb;en-us;269019
Now, we also use the AT&T network client for their main connection, then they connect to our network via a VPN connection. We have several other back up dial-up connections as well. Usually, but not always, the AT&T connection will still be usable, but not visible in the "Network and Dial-up connections" window and the rest of the connections, dial-up and VPN will be totally gone. I don't know if it is something that is caused by this AT&T dialer, or Windows 2000....or something completely different. It's not happening to all of the laptop users (we have about 90 of them configured exactly the same way) but just the 6 or 7 of them. I haven't found a common denominator that sets them apart from the rest. I'm at my wit's end!
We've recreated the connections, and they usually stick around for a couple of weeks, then they'll suddenly disappear again. Any help anyone could give me would be wonderful.