If your NT server uses only TCP/IP and your W95 client uses IPX/SPX and TCP/IP with Client for Microsoft Networks installed and the Novell Client for NetWare Networks installed, and IPX/SPX is the default protocol, the network logon validation may time out before TCP/IP sends a confirmation.
Microsoft says that the only solution is to unbind IPX/SPX and remove the Novell Client software.
To do this:
1. Control Panel / Network / Configuration.
2. Select the network adapter in the list of installed components and click Properties.
3. Click Bindings and clear the IPX/SPX Compatible Protocol and any Novell client check boxes.
4. Press OK and OK.
5. Click Yes to restart your computer.
NOTE: If you can afford it, you could try adding the IPX/SPX protocol to the NT server or making TCP/IP the default protocol on the W95 client.