How to Cancel Oracle Data Access Components

To fully uninstall Oracle Data Access Components (ODAC) from your computer, follow these steps carefully:

Stopping Oracle Services

Before you begin the uninstallation process, you must stop all Oracle services.

• Open the Windows Services utility: From the Start menu, choose Programs, then Administrative Tools, then Services.
• If any Oracle services (names begin with Oracle or Ora) exist and have the status Started, select each of the services and click Stop.
• Exit the Services utility.

Uninstalling with Oracle Universal Installer

1. Start Oracle Universal Installer:
   • Navigate to the Oracle home directory or the installation media.
   • Double-click setup.exe to start Oracle Universal Installer.
   • In the Welcome window, choose Install/Deinstall Products.
   • Click the Deinstall Products button.
2. Select Components to Remove:
   • The Inventory window appears. Select the Oracle home you wish to remove.
   • Expand the tree of installed components if you want to remove selected components of an Oracle home.
   • Check the boxes of the components to remove.
3. Confirm Removal:
   • Click Remove. The Confirmation window appears.
   • Click Yes to remove the selected components.
   • A message may appear indicating that removing some components may cause other components to not function properly.
4. Exit Oracle Universal Installer:
   • After the components are removed, the Inventory window appears without the removed components.
   • Click Close to close the Inventory window.
   • Click Cancel to exit Oracle Universal Installer.
   • Click Yes to confirm that you want to exit.

Manually Removing Remaining Components

After using Oracle Universal Installer, you need to manually remove the remaining components.

Removing Registry Keys

• Log in as a member of the Administrators group.
• Open the Registry Editor: From the Start menu, choose Run, and enter the command regedit.
• Navigate to and remove all Oracle-related registry keys. Be cautious as removing incorrect entries can break your system.
• Exit the registry editor and restart your computer.

Removing Environment Variables

• Remove any Oracle-related environment variables.

Removing Start Menu Options

• Check the Start menu for any Oracle Database Client entries and remove them:
  • Select Start, then Programs, then Oracle – HOME_NAME.
  • Right-click Oracle – HOME_NAME, and from the menu, select Delete.
  • Alternatively, right-click the Start button, select the Explore All Users option, and under Documents and Settings, expand the Start MenuPrograms folder. Right-click and delete the Oracle – HOME_NAME folder.

Removing Directories

• Delete any remaining Oracle directories, including those under ORACLE_BASE and ORACLE_HOME.

Additional Steps for ODAC

If you specifically installed ODAC, you can also use the uninstall.bat script if available:

• Navigate to the Oracle home installation directory.
• Execute uninstall.bat to unconfigure and uninstall ODAC products.

By following these steps, you will ensure that all Oracle Data Access Components are completely removed from your system.