I've tried all the links nothing works. I'm using a mac. Packages I'm using are:
\usepackage{graphicx}
\usepackage{caption}
Keeps coming out with the stupid Board.png on top how do I delete?
\begin{figure}[ht!]
\centering
\includegraphics[width=64mm]{Top Board.png}
\caption*{Particles striking 2+ fibers on the top boards \label{overflow}}
\end{figure}

\usepackage{grffile}fixes it for me. (Or just don't use spaces in filenames...) – Torbjørn T. Jan 26 '16 at 10:02