Microsoft says it might be spyware.
So, I ran full sytem scans with my up-to-the-minute AVG anti-spyware and anti-virus.
In my Downloads file, I have multiple copies of something called Hurl, which when I delete (all copies) it always comes back - in multiple copies.
When I simply click on the Hurl icon, I get what looks like a small black Dos screen that stays open for just an instant. It looks like the word ‘town’ is in the upper right - above the black screen, but I’m not sure.
I’ve had this Hurl thing for a long time and it never caused any problmes before, so maybe that’s a red herring.