Can't burn to Blu-Ray or make ISO

I tried to burn a project to Blu-ray but PrE13 encountered an error after hours of rendering that gave no info on how to solve it.  I tried the
suggestions on this board about making an ISO.  I created one and then burned it but it would not play on a Blu-ray player.  I turned off the GeForce  in preferences and now it won't even make an ISO.  It was at 98% and I left the room for a few minutes.  When I came back, there was no ISO and the program had shut down.  I have done this several times with the same results.  After the last time, I went back into the program and GeForce was rechecked somehow.  I just spent days compiling a project that I have no way to burn and view.  All the online info pertaining to this issue is years old.  Is there a solution yet?  What am I supposed to do now?