Start PostgreSQL in Windows
Download and install/extract the postgre server
Create a data folder under pgsql as
C:\softwares\installed\pgsql\data
Open command prompt and Navigate to the extracted/installed folder,
For Example
C:\softwares\installed\pgsql\bin
and type the following command
pg_ctl -D C:\softwares\installed\pgsql\data -l logfile start
finally,
type initdb.exe C:\softwares\installed\pgsql\data for initializing the database