[Thythe]

download HijackThis and run it. You will get a list of programs and various other stuff running on your computer. In one of the lists is startup stuff. Most likely wild tangent is still trying to start up when you turn on your computer. Remove the reference to it from the list in Hijack This. Be very careful, though, if you remove the wrong stuff your computer will be screwed. Only remove the reference to Wild Tangent.