Mysterious NON-BROWSER popup ad
http://www.flickr.com/photos/45829284@N05/7238261850/in/photostream
Can anyone explain the little popup Disk Doctor ad here (I linked to a picture)? To clarify, I started my MacBook up from completely shut down. It automatically connected to my home WiFi, but I had not opened any browser or any other program. I first did a spotlight search for Disk Doctor, then checked in the Activity Monitor to see if I could find something that explained it. I have NEVER downloaded Disk Doctor or any version or trial of it. I came to another computer and tried to find some mention of something like this online, but no luck. I then turned off the WiFi on my MacBook and put it to sleep, until I get this figured out. The window behind that popup is just an empty window I used to hide my desktop files in the photo, but the popup floats above everything else. Other than opening Activity Monitor, and then Paint to make that blank window, I didn't open any other programs.
I really want to know what the **** this is, and what is putting popup ads onto my desktop when I have opened no programs and particularly no web browsers.
Thanks
MacBook, Mac OS X (10.6.8), Snow leopard, popup, ad