Just today (12.19.2013), after rebooting my computer, getting a notice I had an Adobe update (I do believe it was for Flash), and installing said update, I now have a very holiday-colored pop up in the lower right of my computer that is urging me to take part in the special Christmas Sale of Advanced SystemCare Pro.
I don't have this software on my computer, nor do I know why I am getting this. I know it could be from different sources, but naturally I am thinking it's from the Adobe update since this didn't pop-up until AFTER the update was finished. My computer had sat for about 5 minutes after restart before I got to letting the update do its thing, so naturally I think if it was installed prior, it would have shown up at start-up. The Adobe update that I get seems legit to me in appearance and the way it functions, so I might be jumping the gun here on thinking that's what did it.
I'm really hoping someone else here has had this issue and can point me at what's caused it and how to get rid of it.