Completely uninstall Oracle database software

Software Environment:
1. Windows xp+oracle 8.1.7
2, the ORACLE installation path is: C:\ORACLE
Implementation method:
1. Start-> Settings-> Control Panel-> Management Tools-> Services
Stop all Oracle Services.
2. Start-> Program->oracle-orahome81->oracle installation products->
Universal Installer
Uninstall all Oracle products, but universal installer cannot be deleted by itself
5. Run regedit, select Hkey_local_machine\software\oracle, and press Del to delete this entry.
6. Run regedit, select HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services, scroll
This list, delete all Oracle portals.
7, running RefEdit,
Hkey_local_machine\system\currentcontrolset\services\eventlog\application,
Delete all Oracle portals.
8. Start-> Set-> Control Panel-> System-> Advanced-> Environment variable
Delete environment variables classpath and path for Oracle settings
9. Remove all Oracle-related groups and icons from the desktop, Startup group, program menu
10. Delete \program Files\oracle Directory
11. Restart the computer to completely remove the Oracle directory after restarting
12. Delete the Oracle-related files, select the default directory where Oracle is located C:\Oracle, delete this entry
Directory and all subdirectories, and remove the following from the Windows 2000 directory (typically C:\WINNT)
Pieces Oracle.ini, Oradim73. INI, Oradim80. INI, Oraodbc.ini, and so on.
13, WIN. INI file if there is a [ORACLE] tag segment, delete the segment
14. If necessary, delete all Oracle-related ODBC DSN
15. To the Event Viewer, delete the Oracle-related logs
Description
If there are cases where individual DLL files cannot be deleted, do not bother, restart, start a new installation,
When installing, select a new directory, then, after installation and restart, the old directory and files can be deleted.

Completely uninstall Oracle database software