How do we totally uninstall ORACLE 11g 64 bit from our Windows 7 64 bit machine?

Posted on 2012-09-13
Last Modified: 2012-09-18

We're having issues with installing and configuring ORACLE 11g onto a Windows 7 64 machine.
We are now at the point of trying to completely uninstall ORACLE 11g so we can reinstall.

Unfortunately, we've run into several issues trying to deinstall as well. We can't seem to get the ORACLE Universal Installer to lauch from the Windows Start menus. When we click on the OUI, it does not launch. We get no error messages of any kind. We don't see the process/task start in the Task Manager. We have spent several days trying to install/configure and are getting terribly frustrated at this point.

The best course of action we can think of is to uninstall and start again. However, we can't run the OUI. How can we clean ORACLE off our machine totally, so we can start the install from scratch. We've done a fair amount of browsing for answers. A lot of folks seem to run into this issue. All the solutions start with "Run the OUI" (which we of course can't).

We are stuck at this point. What is the best way to procede?

Once we finally get to ground 0, we can try to figure out the DB configuration issues we were seeing before.

We could sure use a hand.

Question by:jxbma
    LVL 76

    Accepted Solution

    Look around on Google/Bing/??? for manual oracle uninstall.

    Shut down any running Oracle service.
    Delete the C:\Program Files\Oracle folders (also look in the x86 program files).
    Delete the Oracle install directory (this might have issues since other programs might lock Oracle DLLs  if so, delete what you can then rename the folder).
    Run regedit:  Delete any Oracle references you find.
    Delete any remaining Oracle folders/files.
    LVL 23

    Assisted Solution

    - if you are installing Oracle 11.2, there is a deinstall tool provided by Oracle, you can download from OTN. the steps to using the tool is in the oracle doc:

    - OTN download:

    OR choose your OS:
    LVL 20

    Expert Comment

    Another possibility that might save you some time, if viable, is to just nuke the OS and rebuild it.

    I've done the procedure described by slightwv in the first post and, while it works, it always left me wondering if there was anything I missed (for example, in the registry).

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