suomynonayats

I experienced the same thing. I tracked it down and it was a known computer on my network. I received these while my physical line was upgraded in the neighborhood. Do you have a router, and a separate switch? I finally hard wired everything to the router, bypassing the switch, and the alerts subsided. If I'm not mistaken I also remember these as a "HIPS" alert, and I had mine set to something like insanely paranoid or something. Maybe back the security level a notch back? I'm going to do more work on this, since it seems like only one or two possibilities.