Failed to load sql modules into the database cluster during PostgreSQL Installation

Question

I have attempted to install PostgreSQL 9.4 and 8.4 multiple times and it is failing no matter what I have tried. I am attempting to install on Windows 7 SP1 x64. After each

Answer 1

I was getting this issue with the BigSQL windows installer PostgreSQL-9.6.5-1-win64-bigsql.exe The problem turned out to be that my system path was too long. After removing some uncessary junk from my System Path, and then reinstalling, the problem was gone.