As I understand it a winmodem is one which uses your computers processor and memory rather than a normal modem which has everything it needs built in. It'll just slow the machine down a bit.. .Port 3 will be a virtual port allocated to the built in modem.. .It sounds as though something is conflicting with the modem. If you have an external modem that you can try it might be worth a go. Without teaching you to suck eggs dont forget to change the modem over in the dial up networking connection