Try swapping firewalls - which ever one you disabled, enable it & configure it to allow LW. Then turn the other one off.

You said in your first post that you've got a satellite modem!! There's no firewall in that modem. Most routers do have their own internal firewall, that's why I asked whether you're also using a router.

Try changing ports. In LW tools > options > advanced > firewall config. Change LW's listening port to 64049 (or something in the range of 49152 - 65535) > apply > ok.