how to uninstall upertask bar app ??

[werdow]

hi there
i was facing last week slowness in my mac-book pro after i find there a strang icons in the upper task bar which i don't know how it come on . . .
here an image for it .

http://www.AceLayouts.com/uploads/images/2010-01-08/z8lKUQVSLO.png

hope to hear from some one soon

thanks