The usual way to uninstall programs from a Windows-based computer is with the program removal tool in the computer's Control Panel. However, this method doesn't always work correctly when you try to uninstall the Oracle 11G database program. To uninstall Oracle 11G for Windows, you might need to remove the program from your computer system by manually editing your computer's registry, and removing the Oracle software directories from folders.
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Click the "Start" button on the Windows desktop taskbar. Type "regedit" into the search box at the bottom of the Start menu.
Select "Regedit" in the "Programs" section at the top of the Windows search results. This opens the computer's Registry Editor.
Click "HKEY_LOCAL_MACHINE" in the folder tree menu on the left. Check the "Software" folder. Select and highlight "Oracle" and press the "Delete" key on your computer keyboard. This removes the registry entries for Oracle software products.
Click "HKEY_LOCAL_MACHINE" again, then click "System," followed by "CurrentControlSet" and then "Services." Delete any folders labelled with "Oracle" in this section.
Press the "X" icon in the top right-hand corner of the Registry Editor program window to exit this application. Restart your computer.
Click "Start" and choose "Computer." Locate the "Oracle" folder on your computer's main drive, which is usually the "C:" drive. Click the folder to highlight it, then press the "Delete" key on your keyboard. Delete the "Oracle" folder in your "Program Files" folder on the "C:" drive.
Go to the "Temp" folder on your "C:" drive. Highlight and delete all the contents.
Double-click the Recycle Bin on your desktop screen. Click "Empty Recycle Bin" in the main navigation menu to remove all deleted files permanently. Restart your computer.
Tips and warnings
- Perform this procedure if you are permanently removing the Oracle software or before upgrading to a newer version of Oracle.
- Always take care when you are editing your computer's registry, because mistakes can stop the computer from working correctly. Consider backing up the registry before making changes. Do this by clicking the "Export" option from the Registry Editor "File" menu. This saves a backup copy of the registry to the computer before you edit it.
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