Windows 7 pro 32 bits fr

https://nightly.odoo.com/8.0/nightly/exe/odoo_8.0.latest.exe -> C:\Program Files\Odoo 8.0-20150731

http://localhost:8069/ -> "Internal Server Error", "The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application".

pgAdmin : connect -> The server doesn't accept connections: the connection library reports

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?

in C:\Program Files\Odoo 8.0-20150731\PostgreSQL\data, no file but pg_log folder, no postgresql.conf !