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

• Changed the data directory to something other than the installation directory of postgres

Make sure NETWORK SERVICE has read/write permissions on that folder, the installation was failing for me until I did this.