Permanently delete Oracle (also applicable to 10 Gb)

1. Choose "start"> "Settings"> "Control Panel"> "Administrative Tools"> "services" to stop all Oracle services.
2. Start-> Program -> Oracle-orahome81-> Oracle Installation products-> universal installer uninstalls all Oracle products,
However, the universal installer itself cannot be deleted.
3. Run regedit, select HKEY_LOCAL_MACHINE \ SOFTWARE \ oracle, and press del to delete the entry.
4. Run regedit and select HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Services. Scroll through the list and delete all Oracle entries.
5. Run refedit, HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Services \ Eventlog \ Application to delete all Oracle entries.
6. Choose "start"> "Settings"> "Control Panel"> "system"> "advanced"> "environment variable" to delete Oracle settings in the environment variables classpath and path.
7. Delete all groups and icons related to Oracle from the desktop, startup group, and program menu.
8. Delete \ Program Files \ oracle directory
9. restart the computer to completely delete the Oracle directory.
10. Delete Oracle-related files and select the default Oracle directory c: \ oracle,
Delete this input directory and all subdirectories, and under Windows 2000 directory (generally c: \ WINNT)
Delete the following files: Oracle. ini, oradim73.ini, oradim80.ini, oraodbc. ini, and so on.
11. If the [Oracle] Tag segment exists in the win. ini file, delete it.
12. If necessary, delete all Oracle-related ODBC DSN
13. Delete Oracle-related logs in Event Viewer
NOTE: If some DLL files cannot be deleted, You can restart and start new installation,
During installation, select a new directory. After the installation is completed and restarted, the old directory and files can be deleted.