I hope you didn't take offense at my replies to your topic. I wasn't trying to knock you down mate, just addressing the subject.
I see you started a topic earlier on firewalls also. I can see you take your system security seriously and I wanted to make a recommendation. I use a product called M0n0wall, both at home and at my company. Here are pre-buillt routers with this firewall installed as firmware.
This is the equivalent of a commercial firewall in a box. It is just as powerful a a Cisco router in terms of protection but a hell of a lot easier to configure. With this device you can monitor ALL of your network traffic, see exactly which ports are being used, block all ports except your needed ones, prevent all unauthorized connections to you machine going in AND out. Because it is open source code it is highly verified and highly secure. Multimillion dollar companies rely on this exact same software for security, it's what we use here at my company (not this box, but the software that runs on it) and I can tell you, it is ultra secure without being ultra complicated.
This solution prevented my machine being infected with this add-on ware, which did present on your machine.