I have never installed any sort of file sharing program on my computer. I'm worried that someone may have been able to sneak something in now. My firewall logs are filling up with tons of hits to this port. I found this forum after doing some investigation on the port.

Do people randomly look for these gnutella clients?
Would so many hits from one address indicate that my machine is "advertising" that it's a gnutella client? If so, is there a way I can find out which client was installed or is there a way I can shut off the advertising?