"Fire Flies" Render Bug

I need some help or guidance please!
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whenever i render an interior and use any shininess for materials (for example a wooden floor) this fire flies effect occurs. Those are the many little white dots as you can see below. And I can’t find a way to avoid that. - So I am happy about every help and every hint…

for now i can only avoid any shininess at all, which drastically reduces my render quality :cry:
FireFlies Render Settings.jpg


Have you put some bumps effect ?? It may causes that effect.

A little question does your render stop at 3/4 100% or does it continue to the end…

Thank you.