Aha, ahahahahaha, I wonder if that's what got rid of Zonealarm, and winmx, and possibly Yahoo, there's been a lot of funny (peculiar) things going on just lately and I'd put it down to putting a new hard drive in and cleaning up the old one.
I'm going to try and reload that which I've lost and see if that works, it's a nasty little bugger wherever it came from, but I'm pretty sure your guests weren't 'round my house, maybe my kids were trying to download ringtones............ looks like a postmortem is called for.
Will keep an eye on this thread to see how things are going.