1. Start-> Setup-> Control Panel-> Admin Tools-> Service Stop all Oracle services.
2, Start-> Program->oracle-orahome92->oracle installation products-> Universal Installer Uninstall all Oracle products, but Universal Installer itself cannot be deleted
3, run regedit, select Hkey_local_machine/software/oracle, press del key to delete this entry.
4, run regedit, select hkey_local_machine/system/currentcontrolset/services, scroll this list, delete all Oracle portals.
5, run refedit,hkey_local_machine/system/currentcontrolset/services/eventlog/application, delete all Oracle portals.
6. Start-> Setup-> Control Panel-> System-> Advanced-> Environment variable DELETE environment variable classpath and path Oracle settings
7, from the desktop, startup (startup) Group, program menu, delete all the Oracle-related groups and icons
8, delete c:/program files/oracle directory
9. Restart the computer to completely remove Oracle's directory after reboot
10, delete the Oracle-related files, select the default directory c:/oracle Oracle, delete this entry directory and all subdirectories, and delete the following files from C:/windows Oracle.ini, Oradim73. INI, Oradim80. INI, Oraodbc.ini and so on.
11, WIN. INI file, delete the segment if there is a tag segment in the [ORACLE]
12. Delete all Oracle-related ODBC DSN if necessary
13, in the Event Viewer, delete Oracle-related log Description: If there are individual DLL files can not be deleted, then ignore, reboot, start a new installation, install, select a new directory, then, after installation and restart, the old directory and files can be deleted.
