Have you made sure that the Windows firewall is off, & that PC-Cillin firewall is allowing LW?

Something's blocking LW's default port. Could be your ISP, but I can't find any info about that. Change LW's listening port (tools > options > advanced > firewall config) to 64049, or something in the range of 49152-65535. Click Apply to save a change.

Try using this older version of Java.
Java SE Downloads - Previous Release - JDK 5
Use the JRE offline installer & remove your current version of Java before you install the older one.

Your router has a firewall. If it supports UPnP, enable it within the router & then choose the UPnP option on that same page where you changed LW's listening port. If that's no help then try port forwarding. The instructions for your router are here.
Port Forwarding for the Dynex DX-E401

Don't forget the step of setting up a static IP. LW's listening port, port in the 'manual port forward' box & port forwarded within a router must all be the same number