I installed SQL server 2008 and then 2012 , when I tried to create new DB in SQL server 2012, it creates DB in Sql server 2008 default path.
May be because of the instance created for 2012 is not correct.
So I uninstalled Sql server 2012.
Now when I tried to install SQL server 2012 - 64 bit again, installation file is not running. When I clicked New Sql server Stand alone , it is not working, just checking for product update and it is coming back to New sql server stand alone installation window.