Your post didn't describe the network connections. Just to head off one post, an invalid setup I've seen a few times is to connect the DSL modem to a "HUB" and the machines to the HUB.
This doesn't work.
Tell about your network.
My main computer which is connected to broadband is fine [windows xp] the other computer [windpws 98 s e ]works ok I can receive email and send messages but I cannot open explorer to surf the net I have tried the wizard several times any help would be appreciated not too technical please regards Jim Daniel