Mystery System Tray Icon - anybody recognize it?

Anybody know what this icon is in my system tray? When I hover over it, it only displays that it's downloading updates (10%) but the percentage never changes. Left-clicking or right-clicking on the icon does absolutely nothing. I've opened up Windows Task Manager to see what it might be, but I can't spot anything too suspicious. It looks like a shield but I uninstalled McAfee months ago and also recently uninstalled the horribly bloated Adobe Reader 8.1 (Foxit Baby!).

Anybody recognize this tray icon? What the hell is it, and how can I get rid of it?

Blogged with Flock