Sure.. We have a windows 2000 server and win 2000 clients. No one can log on, it happened since we had a trojan virus which I have deleted but I think it brought something else in. On the Server in the registry was an entry as follows:
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"WinVNC"="\"C:\\WINNT\\system32\\config\\com1\\servu\\remote\\vnsystask.exe\" -servicehelper"
"NetworkStartup"="net share IPC$ /delete /yes"
I have since deleted this, but no one can log onto the domain, also from the server I cannot open active directory, I get the message'naming information cannot be located because the logon attempt fasiled, caontact your administrator to verify your domain is configured properly and is currently on line. If I then right click the active dierctory users etc..and try to find the domain, it finds it from browes but then says 'windows cannot connect to the new domain because teh logon attempt failed.