I've been seeing this appear on the bottom-right part of my task bar a lot, and no matter what I do I've never been able to figure out what it's for. If I try to click on it or hover over it for the name to appear the icon just goes away, right clicking does nothing and I can't find it in task manager.
Google search revealed nothing. Have you looked through your processes in task manager and looked at each one individually? Have you looked at ALL processes (as much as that sucks) to see if its starting outside of your user account? If you REALLY want to know, run msconfig.exe, then select selective startup, disable all processes and re-enable them one by one until it reappears.