How to completely uninstall Oracle 11g (windows)

1. Deactivate the oracle service : enter the computer management, in the service, find all the services starting with oracle, right-click and select stop

2. In the Start menu, find Universal Installer, run Oracle Universal Installer, and click Uninstall Product

3. In the product list window, click to expand all, check other items except OraDb11g_home1, and click Delete

4. Press the Windows logo key and R key to open the run window, enter regedit, open the registry, expand HKEY_LOCAL_MACHINE\SOFTWARE in turn, find oracle, and delete it

5. Expand HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services in turn and delete all items starting with oracle

6. Expand HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Eventlog\Application in turn, delete all items starting with oracle

7. In HKEY_CLASSES_ROOT, delete items starting with ora

8. Restart the computer, delete the oracle directory, delete the Oracle installation directory app, etc.