The following bug has been logged online: Bug reference: 4201 Logged by: Nahum Castro Email address: nahumcastro(at)gmail(dot)com PostgreSQL version: 8.3.1 Operating system: Windows Vista Home Premium Description: Instalation fails Details: Instalation fails with an initdb error, workarounds fails like running initdb manually as windows postgres user. Thanks. Where is the bug finder? Perhaps it is already reported.