Getting "uninstall.exe is safe" pop-up every time I start IE 8

Just upgraded to NIS 2011 this week.  Ever since then, every time I start up Internet Explorer 8, a pop-up appears that says "uninstall.exe is safe". 

 

The uninstall.exe program to which this refers appears to be associated with a third-party toolbar (from iRazoo.com).

 

Any idea why this appears every time, and how I can get rid of it?