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How to uninstall Oracle installation failed

Thomas Edward Brown

Apr 11, 2025 pm 08:24 PM

oracle

Uninstall method for Oracle installation failure: Close Oracle service, delete Oracle program files and registry keys, uninstall Oracle environment variables, and restart the computer. If the uninstall fails, you can uninstall manually using the Oracle Universal Uninstall Tool.

How to uninstall Oracle installation failed

How to uninstall Oracle installation failed

Question: How to uninstall Oracle after failure to install it?

answer:

Step 1: Close Oracle Services

Locate and open the Services window (Windows R, and type services.msc).
Find all services starting with "Oracle".
Right-click each service and select Stop.

Step 2: Delete Oracle Program Files

Go to the Oracle installation directory (usually C:\oracle\product\12.2.0.1).
Delete all Oracle-related folders, including the following:
- bin
- dbhome_1
- Inventory
- oraInst.loc
- oraparam.ini

Step 3: Uninstall Oracle Registry Key

Open Registry Editor (Windows R, and type regedit).
Go to HKEY_LOCAL_MACHINE\SOFTWARE\Oracle.
Delete the registry key created by Oracle installation failure.

Step 4: Delete Oracle environment variables

Open the System Properties window (right-click this computer and select Properties).
Click Advanced System Settings.
In the Environment Variables section, delete all environment variables that contain "Oracle" or "ORACLE".

Step 5: Restart the computer

After the uninstall is complete, restart the computer to apply the changes.

Notes:

If the uninstall process fails, you can manually uninstall Oracle by using Oracle Universal Uninstall Tool (OUD).
If you encounter any issues during the uninstall process, please consult Oracle documentation or seek professional help.

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