Uninstall / Deinstall Oracle 11g on windows

How to deinstall Oracle11g on windows system.

Step:

Oracle11g introduce new utility "deinstall" to uninstall/deinstall oracle database with configuration files.

run deinstall.bat file $ORACLE_HOME/deinstall/deinstall.bat

and give the prompt details then system will remove all the related files/services/folder.

if oci.dll not delete during deinstall process then restart system and delete manually.