Oracle complete deletion method

1. Start-> Run. Enter SERVICES. MSC to the service and stop all Oracle SERVICES;
2. Start-> Program-> Oracle-OraHome81-> Oracle Installation Products-> Universal Installer. Uninstall all Oracle Products, but the Universal Installer 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 regedit, HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Services \ Eventlog \ Application to delete all Oracle entries;
6. Choose my computer> system> advanced> environment variables 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 Files \ Oracle directory;
9. restart the computer to completely delete the Oracle directory;
10. Delete the Oracle-related files, select the default Oracle directory C: \ Oracle, delete the entry directory and all subdirectories, and select the directory (generally C: \ WINNT) delete the following file ORACLE. INI, oradim73.INI, oradim80.INI, oraodbc. ini and so on;
11. Delete the [ORACLE] Mark segment in the WIN. ini file;
12. If necessary, delete all Oracle-related odbc dsn;
13. In Event Viewer, delete Oracle-related logs.
NOTE: If some DLL files cannot be deleted, You can restart and start a new installation. If you select a new directory during installation, after the installation is completed and restarted, the old directories and files can be deleted.