- Fire up the Universal Installer, click Remove and uninstall Oracle. Unfortunately, there are many traces left, which you'll have to handle manually.
- Using Windows Explorer, navigate to your ORACLE_HOME directory. Remove this directory.
- Using Windows Explorer, remove the C:\Program Files\Oracle directory.
- Go to Start --> Run and type "regedit" in the dialog box. This invokes the Registry Editor.
- Delete the HKEY_LOCAL_MACHINE\Software\Oracle folder in the registry.
- Reboot your machine.
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