As for the ports window... here is a summary of what it is and what it means.
What it is:
The Local Port listing is a list of any ports Invision finds in use by some program, or by Windows itself. These ports can be in active use, or passive use (open, but not currently transmitting/receiving data).
What it means:
The Local Port list will show you various ports and a definition of what *usually* runs on that port. As mentioned, all versions of Windows will have at least a port or two that are open. Windows XP tends to have 4-5 by default, tho some of those can be closed by turning off various processes in Windows. Many other programs will also have ports open if they use the Internet in any way. And some programs allow you to change what port is being used, so sometimes you'll see a strange port number from Invision that is just from some other program that is using that port.
So Invision says you have a port open and lists it has being a trojan. First of all, do *NOT* think this means you definitely have that trojan. The port is open, but why it is open is not known from Invision. Invision uses a port list that has the trojans that commonly use certain ports already listed next to the port. It cannot scan to see if there really is a trojan or what one.
The best thing you can do is to use a virus scanner that is updated with current virus definitions to scan your computer. If it finds nothing, you should be fine. You might also consider trying a trojan or spyware scanner as well to be very sure there's nothing there that shouldn't be. Anytime you see a port that you haven't seen there before it would be good to check... you should check regularly anyhow.
So, just remember that the port check is there as a tool and not has a virus scanner. Don't worry if it says you have a trojan if you've scanned your computer and know that you don't.
