I downloaded PostgreSQL from their site - http://www.postgresql.org/download/windows
However, I can\'t create a database from pgAdmin and get a mess
I have the solution to this problem enters (Start -> Run -> services.msc) are looking for the postgresql service once you localizas le das Properties---> login and you disable the account you have and what you leave as the local system account , save and restart the programs pgadmin3 and ready should operate.
Greeting from Colombia