Hi frenzy.usa

All the computers all set to 'Obtain an IP address automatically' and 'Obtain DNS server address automatically'.

I do not know how to access the page on the router/modem that lists the DHCP leases. So I cannot check to make sure that there are only 3 computers listed and none of them are listed twice.

Cable enters house and goes to VOIP box (Solwise Firmware Version 47.68.1); one cable goes from there to wired network hub; from there three cables go out, one to each computer.

The VOIP ATA box (Solwise Firmware Version 47.68.1, has mst of its label erased by the ISP who instllaed the switch. I don't know if it is called a switch box, or router. Basically, there is a continuous link to the internet from the cable coming out of the wall and all the computers (except the one in question, although it used to as well) can connect to the internet directly by putting this cable into the back of the computer (into the ethernet socket?).

I am going to try the WinSock XP Fix suggested by frenzy.usa.

Hope the information helps.

Joe