The Oracle Database software is available on the installation media or you can download it from the Oracle Technology Network (OTN) website.

In most cases, Oracle Universal Installer provides a graphical user interface (GUI) to install the software. However, you can also use Oracle Universal Installer without the GUI by supplying a response file with silent or response file mode.

• Installation Consideration on Windows
  On Windows, open command prompts with the Administrator privileges.
• Performing Multiple Oracle Database Installations
  To perform multiple installations of Oracle Database, use either of the following methods to install Oracle Database:
• Installing on Systems That Already Have Oracle Components
  Perform the following steps when other components exist on your computer:
• Installing with Minimum Memory Requirements
  Installations of Oracle Database on computers with RAM and virtual memory lesser than the minimum required have the following limitations: