I am looking for clear step by step instructions to restore superuser role to postgres user that comes at install. I had to perform the below instructions (which didn't work thus far), because in pgAdmin I created a new Login Role user and assigned superuser privileges. Then I checked off superuser privileges from postgres, only to find out my new superuser was no superuser at all.

Below instructions are also here: Restoring the superuser account on the postgres server

1) Create a local user called 'postgres'

c:\windows\system32> net user username password /add

2) Assign write rights for this user on the data folder

right click on Postgresql 9.5 install folder at c:\Program files\Postgresql\9.5\
click properties
click security tab
click edit (computer as for administrative rights... ok)
select 'all users' and check box 'total control'
click apply and wait for computer to assign writing privileges

3) Stop the postgres service from services

open the services list on windows through task manager
right click on postgresql 9.5
stop the service

4) Open a command prompt as postgres user (e.g. runas /user:postgres cmd)

c:\windows\system32\runas /user:postgres cmd
enter postgres user password
wait for another cmd window open under postgres user

5) On postgres cmd window run postgres in single user mode

c:\windows\system32>cd c:\Program Files\PostgreSQL\9.5\bin
c:\Program Files\PostgreSQL\9.5\bin>postgres.exe --single -D c:\Program Files\PostgreSQL\9.5\data

At this point I get this error message:

postgres não pode acessar o arquivo de configuração do servidor "c:/Program/postgresql.conf": No such file or directory

Translating the part from Portugues to English you get:

postgres cannot access server's configuration file


1 Answer 1


Your problem is this line:

c:\Program Files\PostgreSQL\9.5\bin>postgres.exe --single -D c:\Program Files\PostgreSQL\9.5\data

If there are spaces in a command line parameter you need to quote like this

c:\Program Files\PostgreSQL\9.5\bin>postgres.exe --single -D "c:\Program Files\PostgreSQL\9.5\data"

This isn't really a problem with Postgres but just how command line works.

  • Thank you SO MUCH for your support and patience. Who would have guessed? :) Yet, it is still a mystery for why my new superuser user have no superuser privileges after removing postgres superuser privileges. Feb 26, 2016 at 11:06

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