Download the setup
For Windows Setup Download link below:
http://download.oracle.com/otn/nt/oracle12c/121020/winx64_12102_database_1of2.zip
http://download.oracle.com/otn/nt/oracle12c/121020/winx64_12102_database_2of2.zip
Once download open folder and start the setup.
For support you can give email address or skip the option.
Choose the option from the following options
Like * Create and Configure a database
* Install database software only
* Upgarde an existing database
Now , Select the type of database installation example Single instance , Oracle cluster application , Oracle RAC node configure.
Select the Class to use .
Choose Install type select the Typical or Advanced Install.
Oracle recommends window user account .Select the following s options from them.
Give Global database name as ORCL. And Enter the administrative password.
Select the Container database if you want in your production.
Once review all then proceed to Install button.
Oracle 12c Release 1 now installed.