How to reinstall Oracle after deletion

Many of my friends only use oracle to delete the system. However, in many cases, he may find that the next installation page disappears when the system is re-installed, and he may have to reinstall the system, in fact, this is not the case if your database is not deleted.

Implementation Method:

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, but the Universal Installer cannot be deleted.

3. Run regedit, select HKEY_LOCAL_MACHINESOFTWAREORACLE, and press del to Delete this entry.

4. Run regedit and select HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServices. Scroll through the list and delete all Oracle entries.

5. Run refedit and HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesEventlogApplication 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 the Program FilesOracle directory

9. restart the computer to completely delete the Oracle directory.

10. Delete Oracle-related files, select the default Oracle directory C: Oracle, delete the entry directory and all subdirectories, and delete the following file ORACLE from C: WINDOWS. 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: if some DLL files cannot be deleted, restart and start a new installation, select a new directory. After installation and restart, the old directory and files can be deleted.