Details Steps To Remove Oracle Database

Removing all Oracle components.

These instructions remove all Oracle components, services, and registry entries from your computer. In addition, any database files under ORACLE_BASE\oradata\DB_NAME are also removed.
1. Log in as Administrator group.
2. Stopping oracle services.
3. Start the registry at the MS-DOS command prompt:
4. C:\> regedt32
4. Go to HKEY_CLASSES_ROOT.
5. Delete any key that starts with Oracle, ORA, or ORCL.
6. Go to HKEY_LOCAL_MACHINE\SOFTWARE.
7. Delete the ORACLE and Apache Group keys.
8. Go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services.
9. Delete all keys under here that begin with ORACLE.
10. Go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services \Eventlog\Application.
11. Delete all keys under here that begin with ORACLE.
12. Go to HKEY_CURRENT_USER.
13. Delete ORACLE.
14. Go to HKEY_CURRENT_USER\SOFTWARE\ORACLE.
15. Delete keys that start with Oracle or ORCL (if any exist).
16. Delete any Oracle keys (if any exist).
17. Close the registry.
18. Restart your computer.