How to uninstall Oracle 11G software that are installed in Windows 8? How to uninstall Oracle 11g software that are installed in Windows 8?
I have installed oracle 11g version in local machine.
Oracle has a tool called Deinstall that will remove an Oracle database as well as the Oracle software. Either GUI or command line. Check here on how to use it.

https://docs.oracle.com/database/122/HPCLI/oracle-deinstallation-tool-deinstall.htm