The following bug has been logged on the website:
Bug reference: 14425
Logged by: Ingbert Jüdt
Email address: privat(at)ingbert-juedt(dot)de
PostgreSQL version: 9.6.1
Operating system: Win 7, Win 8.1
Description:
Tried to install 9.6.1 on four machines, only one installation without
issues.
Win Server 2012 R2: no issues
Win 7 (2 machines): Installation completes, but pgAdmin 4 cannot connect to
server or reports connection lost after start (service is running)
Win 8.1: Installation aborts in post-installation step, log file reports
that it cannot find postgresql.conf (installation attempt repeated about 6
times)