Manual Cleanup process and Uninstall Oracle for Windows system

1. Uninstall all Oracle components using the Oracle Universal Installer (OUI).


2. Delete the HKEY_LOCAL_MACHINE/SOFTWARE/ORACLE key which contains registry entries for all Oracle products by using regedit.


3. Delete any references to Oracle services/components in the following registry location: HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Services/. Looks for key entries that starts with “Ora” which are obviously related to Oracle.


4. Reboot the workstation.


5. Delete the ORACLE_BASE directory. (i.e C:\Oracle)


6. Delete the C:\Program Files\Oracle directory.


7. Empty the temp directory.


8. Empty the recycle bin.