In the Windows enterprise operating system, uninstall Oracle 9i:
1. Stop all Oracle services
(Eileenhuan supplement: after the service is stopped, uninstall 9i using the uninstall function provided by Oracle. Restart the machine !!)
2. Delete All Oracle items in the Registry
(1) Delete the Oracle directory under HKEY_LOCAL_MACHINE/software
(2) Delete All Oracle items under HKEY_LOCAL_MACHINE/system/controlset001/services
(3) Delete All Oracle items under HKEY_LOCAL_MACHINE/system/controlset002/services
(4) Delete All Oracle items under HKEY_LOCAL_MACHINE/system/CurrentControlSet/services
(5) delete all Oracle items under hkey_classes_root
3. Delete All Oracle files that have not been deleted on the hard disk
(1) Oracle Installation File
(2) Oracle files in the Program Files folder under the system directory
4. Restart and uninstall.
(Original post from wlq2000 blog http://www.cnblogs.com/wlq2000/archive/2004/10/30/58500.aspx. Thank you !) In addition, do not delete all Oracle-related items in the registry. Instead, you may not be able to reinstall oracle, you may also accidentally delete the key values or items of other software! Enough to delete the above items
