Erro na instalação do PostGres no Win XP SP2

Não consigo instalar o programa no Windows XP, está funcionando normalmente.Aparece a seguinte mensagem no log:The files belonging to this database system will be owned by user "postgres".This user must also own the server process.The database cluster will be initialized with locale C.fixing permissions on existing directory C:/PostgreSQL/data ... okcreating subdirectories ... okselecting default max_connections ... 100selecting default shared_buffers/max_fsm_pages ... 32MB/204800creating configuration files ... okcreating template1 database in C:/PostgreSQL/data/base/1 ... initdb: could not execute command ""C:/PostgreSQL/bin/postgres.exe" --boot -x1 -F template1": Invalid argumentinitdb: removing contents of data directory "C:/PostgreSQL/data"Será algum problema de permissão?