It’s probably not a stand-alone program, but a browser toolbar. In IE, go to the View menu, and look under toolbars. If there is anything from XFinity/Comcast on there, uncheck it to uninstall it.
Nothing on it, no add ons. It’s a pop up ad from Comcast that has no way to exit out. I suppose if I clicked OK, it would down load their program to my computer, which I do not want.
On Comcast web site the people who have down loaded the program still get the pop up ads.