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odooinstallation
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صابر طباطبائییزدی

i installed odoo 16 then uninstall it

so i need to install it again

when i install it this error happens:\

Database creation error: could not connect to server: Connection refused (0x0000274D/10061) Is the server running on host "localhost" (::1) and accepting TCP/IP connections on port 5432? could not connect to server: Connection refused (0x0000274D/10061) Is the server running on host "localhost" (127.0.0.1) and accepting TCP/IP connections on port 5432?


i removel all postgress keys and folders from regedit


but it doesnt solve my problem


any idea?


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Download and install postgresql12，create a user that name is ’openpg‘，password is ’openpgpwd‘’,then everything will be ok.

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Javier Garcia
Best Answer

Hi,

PostgreSQL is not running; that's the only cause of this error. The Odoo installer bundles PostgreSQL, but leftover files/registry keys from the previous uninstall likely caused it to fail silently during reinstall.

Fix step by step:

  1. Check if PostgreSQL service exists: Open services.msc and look for postgresql-x64-14 (or similar). If it's there but stopped, start it. If it's missing, PostgreSQL didn't install properly.

  2. Clean reinstall of PostgreSQL: Since you already removed registry keys, also make sure these folders are fully deleted before reinstalling:

    C:\Program Files\PostgreSQL\
C:\Users\<youruser>\AppData\Roaming\postgresql\

  3. Reinstall Odoo 16; the installer will reinstall PostgreSQL bundled with it. Run as Administrator.

  4. If the bundled PostgreSQL still fails, install it manually from https://www.postgresql.org/download/windows/ first, then install Odoo and point it to your existing PostgreSQL instance.

  5. After installation, confirm PostgreSQL is running in services.msc before opening the browser.

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