I've been using Avast anti-virus again, after having tried several of the alternatives and finding that I liked them even less than Avast. A few minutes ago, I went to my system tray (Windows 7) to click my icon for Notepad, and I sew a new icon there that I didn't recognize. Hover over it, and it said "Avast Secure Browser." WTF? Fired up Control Panel, and I found that, indeed, some time today Avast had installed a new browser they're pushing on my computer without asking me. Needless to say, it's gone now but I am NOT happy that Avast would unilaterally reach into my computer to install software I had not requested.