When a client sends a SMB session setup request to the server, it takes 10 seconds for the server to send a negative session setup response, when the NetBIOS over TCP/IP (NBT) session cannot be established, due to a resource shortage or other server problem.

In Windows NT 4.0, you can modify the timeout by setting the FailedConnectTimeout Value Name, a REG_DWORD data type, at HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Rdr\Parameters, to the timeout in seconds.

NOTE: You must restart your server for this change to become effective.

NOTE: Windows Server 2003, Windows XP, and Windows 2000 use a hard-coded value of 10 seconds.