How do I completely remove the Oracle 11g client from my computer? I am running Windows 7, 64-bit.
I have tried running
deinstall.bat, but this doesn't work.
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First, use Start -> Run -> Services.msc, locate all Ora* services and stop them.
The rest, from Manual and Clean Uninstall Oracle for Windows :
- Uninstall all Oracle components using the Oracle Universal Installer (OUI).
- Delete the
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ORACLEon 64bit) key which contains registry entries for all Oracle products by using regedit.
- Delete any references to Oracle services/components in the following registry location:
HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Services/. Looks for key entries that starts with “Ora” which are obviously related to Oracle.
- Reboot the workstation.
- Delete the ORACLE_BASE directory. (i.e C:\Oracle)
- Delete the directory
- Empty the temp directory.
- Empty the recycle bin.
Steps: Stop all Oracle services first.
I came here because of this message when trying to install Oracle 11g XE, after a previously failed attempt:
"Installer has detected an already existing XE instance on this system. Installation cannot proceed"
Of course I cleaned all according to various sources, including this one, but it kept complaining. It also did not show up in the list of installed programs.
I remembered a very old utility, that was shipped once with Office 2000 I guess. It is called "Windows Installer Clean up utility" (the original download is called
msicuu2.exe). Download it from a trusted source, run it with admin privileges, and you'll probably find an orphaned record for Oracle in the list.
Click [Remove], confirm the warning and proceed with the setup. It worked for me.