Yellow triangle in background render icon

HI 

I see from previous posts  that this could be a java / java permission related issue but I cannot seem to resolve by installing the latest version of Java.

I get huge value from the background rendering capability but this yellow triangle worries me - I have had it since upgrading to 8.6 with Windows 10 - anyone know how to get ride of the little yellow triangle that appears in the background rendering icon? Or why it is even there?

Thanks