How To Uninstall / Completely Remove Oracle 11g (client)?

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Learn more about Labs How to uninstall / completely remove Oracle 11g (client)? [closed] Ask Question Asked 12 years, 11 months ago Modified 1 year, 3 months ago Viewed 517k times 80 Closed. This question is not about programming or software development. It is not currently accepting answers.

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How to uninstall or completely remove Oracle 11g (client)?

Running deinstall.bat doesn't work.

Edit: Further discussion related to why this question was closed and deleted: Why was this question related to uninstalling the Oracle Database Client deleted?

• oracle-database
• oracle11g

Share Improve this question Follow edited Aug 18, 2023 at 16:03 Amira Bedhiafi 11.5k88 gold badges2828 silver badges7272 bronze badges asked Dec 9, 2011 at 19:32 YvesYves 12.5k1616 gold badges5454 silver badges5858 bronze badges 1

• 1 Covered at Super User: superuser.com/questions/256762/… – matt wilkie Commented Sep 28, 2016 at 17:48

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4 Answers 4

Sorted by: Reset to default Highest score (default) Trending (recent votes count more) Date modified (newest first) Date created (oldest first) 142

Assuming a Windows installation, do please refer to this:

http://www.oracle-base.com/articles/misc/ManualOracleUninstall.php

• Uninstall all Oracle components using the Oracle Universal Installer (OUI).
• Run regedit.exe and delete the HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE key. This contains registry entires for all Oracle products.
• Delete any references to Oracle services left behind in the following part of the registry: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Ora* It should be pretty obvious which ones relate to Oracle.
• Reboot your machine.
• Delete the "C:\Oracle" directory, or whatever directory is your ORACLE_BASE.
• Delete the "C:\Program Files\Oracle" directory.
• Empty the contents of your "C:\temp" directory.
• Empty your recycle bin.

Calling additional attention to some great comments that were left here:

• Be careful when following anything listed here (above or below), as doing so may remove or damage any other Oracle-installed products.
• For 64-bit Windows (x64), you need also to delete the HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ORACLE key from the registry.
• Clean-up by removing any related shortcuts that were installed to the Start Menu.
• Clean-up environment variables:
  • Consider removing %ORACLE_HOME%.
  • Remove any paths no longer needed from %PATH%.

This set of instructions happens to match an almost identical process that I had reverse-engineered myself over the years after a few messed-up Oracle installs, and has almost always met the need.

Note that even if the OUI is no longer available or doesn't work, simply following the remaining steps should still be sufficient.

(Revision #7 reverted as to not misquote the original source, and to not remove credit to the other comments that contributed to the answer. Further edits are appreciated (and then please remove this comment), if a way can be found to maintain these considerations.)

Share Improve this answer Follow edited May 23, 2017 at 11:47 CommunityBot 111 silver badge answered Dec 9, 2011 at 19:54 ziesemerziesemer 28.6k99 gold badges8888 silver badges9595 bronze badges 7

• 4 For 64 bit windows, you need also to delete HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ORACLE key – itsho Commented Jul 24, 2013 at 10:55
• 3 First, be careful when deleting "C:\Program Files\Oracle", it may contain other products too. Second, you may need to clean your start menu manually ;) – user123444555621 Commented Feb 27, 2014 at 14:54
• 2 Don't forget to clean up your path settings and remove the ORACLE_HOME environment variable. – Brad Bruce Commented Apr 12, 2014 at 14:52
• 1 its mildly annoying that you used / instead of \ :P – gbtimmon Commented Apr 25, 2014 at 13:58
• 1 @gbtimmon - I assume you are referring to the registry paths. I had simply quoted as-was from the original article. Regardless, they are fixed now. :-) – ziesemer Commented Apr 25, 2014 at 17:55

| Show 2 more comments 11

There are some more actions you should consider:

• Remove Registry Entries for MS Distributed Transaction Coordinator (MSDTC)

Note: on the Internet I found this step only at a single (private) page. I don't know if it is required/working or if it breaks anything on your PC.

• Open Regedit

• Navigate to HKEY_LOCAL_MACHINE\Software\Microsoft\MSDTC\MTxOCI

• Add an x before each string for OracleOciLib, OracleSqlLib, and OracleXaLib

• Navigate to HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\MSDTC\MTxOCI

• Add an x before each string for OracleOciLib, OracleSqlLib, and OracleXaLib

  Otherwise these files, if they exist, will still be in use next time you reboot, and unable to be deleted.

• Remove environment variable ORACLE_HOME, ORACLE_BASE, TNS_ADMIN, NLS_LANG if exist

Check also Oracle doc to find all Oracle related environment variables, however apart from variables listed above they are very rarely used on Windows Client: Oracle Environment Variables

• Unregister oci.dll

  • Open a command line window (Start Menu -> Run... -> cmd)

  • Enter regsvr32 /u oci.dll, resp. %windir%\SysWOW64\regsvr32 /u oci.dll

  • In some cases the file %ORACLE_HOME%\bin\oci.dll is locked and you cannot delete it. In such case rename the file (e.g. to oci.dll.x) and reboot the PC, afterwards you can delete it.

• Remove Oracle .NET assemblies from Global Assembly Cache (GAC). You do this typically with the gacutil utility, if available on your system. Would be like this:

  gacutil /u Policy.10.1.Oracle.DataAccess gacutil /u Policy.10.2.Oracle.DataAccess gacutil /u Policy.1.102.Oracle.DataAccess gacutil /u Policy.1.111.Oracle.DataAccess gacutil /u Policy.2.102.Oracle.DataAccess gacutil /u Policy.2.111.Oracle.DataAccess gacutil /u Policy.2.112.Oracle.DataAccess gacutil /u Policy.2.121.Oracle.DataAccess gacutil /u Policy.2.122.Oracle.DataAccess gacutil /u Policy.4.112.Oracle.DataAccess gacutil /u Policy.4.121.Oracle.DataAccess gacutil /u Policy.4.122.Oracle.DataAccess gacutil /u Oracle.DataAccess gacutil /u Oracle.DataAccess.resources gacutil /u Policy.4.121.Oracle.ManagedDataAccess gacutil /u Policy.4.122.Oracle.ManagedDataAccess gacutil /u Oracle.ManagedDataAccess gacutil /u Oracle.ManagedDataAccess.resources gacutil /u Oracle.ManagedDataAccessDTC gacutil /u Oracle.ManagedDataAccessIOP gacutil /u Oracle.ManagedDataAccess.EntityFramework
  • Entry System.Data.OracleClient should not be removed, this one is installed by Microsoft - not an Oracle component!

• Instead of gacutil /u ... you can also use OraProvCfg /action:ungac /providerpath:... if OraProvCfg is still available on your system. You may find it at %ORACLE_HOME%\odp.net\managed\x64\OraProvCfg.exe.

• With a text editor, open XML Config file %SYSTEMROOT%\Microsoft.NET\Framework64\v4.0.30319\Config\machine.config and delete branch <oracle.manageddataaccess.client>, if existing.

• Do the same with:

  %SYSTEMROOT%\Microsoft.NET\Framework64\v4.0.30319\Config\machine.config %SYSTEMROOT%\Microsoft.NET\Framework\v4.0.30319\Config\machine.config %SYSTEMROOT%\Microsoft.NET\Framework64\v4.0.30319\Config\web.config %SYSTEMROOT%\Microsoft.NET\Framework\v4.0.30319\Config\web.config

  Instead of editing the XML Config file manually you can also run (if OraProvCfg.exe is still available on your system):

  %ORACLE_HOME%\odp.net\managed\x64\OraProvCfg.exe /action:unconfig /product:odpm /frameworkversion:v4.0.30319 %ORACLE_HOME%\odp.net\managed\x86\OraProvCfg.exe /action:unconfig /product:odpm /frameworkversion:v4.0.30319 %ORACLE_HOME%\odp.net\managed\x64\OraProvCfg.exe /action:unconfig /product:odp /frameworkversion:v4.0.30319 %ORACLE_HOME%\odp.net\managed\x86\OraProvCfg.exe /action:unconfig /product:odp /frameworkversion:v4.0.30319

• Check following Registry Keys and delete them if existing

  HKLM\SOFTWARE\Wow6432Node\Microsoft\.NETFramework\v2.0.50727\AssemblyFoldersEx\ODP.Net HKLM\SOFTWARE\Wow6432Node\Microsoft\.NETFramework\v4.0.30319\AssemblyFoldersEx\ODP.Net HKLM\SOFTWARE\Wow6432Node\Microsoft\.NETFramework\v4.0.30319\AssemblyFoldersEx\Oracle.ManagedDataAccess HKLM\SOFTWARE\Wow6432Node\Microsoft\.NETFramework\v4.0.30319\AssemblyFoldersEx\Oracle.ManagedDataAccess.EntityFramework6 HKLM\SOFTWARE\Wow6432Node\Microsoft\.NETFramework\v4.0.30319\AssemblyFoldersEx\odp.net.managed HKLM\SOFTWARE\Wow6432Node\Microsoft\.NETFramework\v4.0.30319\AssemblyFoldersEx\Oracle.DataAccess.EntityFramework6\ HKLM\SOFTWARE\Microsoft\.NETFramework\v2.0.50727\AssemblyFoldersEx\ODP.Net HKLM\SOFTWARE\Microsoft\.NETFramework\v4.0.30319\AssemblyFoldersEx\ODP.Net HKLM\SOFTWARE\Microsoft\.NETFramework\v4.0.30319\AssemblyFoldersEx\Oracle.ManagedDataAccess HKLM\SOFTWARE\Microsoft\.NETFramework\v4.0.30319\AssemblyFoldersEx\Oracle.ManagedDataAccess.EntityFramework6 HKLM\SOFTWARE\Microsoft\.NETFramework\v4.0.30319\AssemblyFoldersEx\odp.net.managed HKLM\SOFTWARE\Microsoft\.NETFramework\v4.0.30319\AssemblyFoldersEx\Oracle.DataAccess.EntityFramework6\ HKLM\SYSTEM\CurrentControlSet\Services\EventLog\Application\Oracle Data Provider for .NET, Managed Driver HKLM\SYSTEM\CurrentControlSet\Services\EventLog\Application\Oracle Data Provider for .NET, Unmanaged Driver HKLM\SYSTEM\CurrentControlSet\Services\EventLog\Application\Oracle Provider for OLE DB

• Delete the Inventory folder, typically C:\Program Files\Oracle\Inventory and C:\Program Files (x86)\Oracle\Inventory

• Delete temp folders %TEMP%\deinstall\, %TEMP%\OraInstall\, %TEMP%\OraInstall\ and %TEMP%\oraremservicev2 (e.g %TEMP%\CVU_11.1.0.2.0_domscheit) if existing.

• Delete service OracleRemExecServiceV2 and Oracle%ORA_HOME_NAME%MTSRecoveryService

  sc stop OracleRemExecServiceV2 sc delete OracleRemExecServiceV2 rmdir %TEMP%\oraremservicev2 /S /Q sc stop Oracle%ORA_HOME_NAME%MTSRecoveryService sc delete Oracle%ORA_HOME_NAME%MTSRecoveryService

Share Improve this answer Follow edited Jul 6, 2023 at 9:52 answered Oct 14, 2015 at 7:46 Wernfried DomscheitWernfried Domscheit 59k1010 gold badges8989 silver badges123123 bronze badges 6

• To remove items from the GAC, you might need to use gacutil.exe which comes with visual Studio. 'gacutil /u Oracle.DataAccess' for example. – scott-pascoe Commented Apr 4, 2017 at 18:06
• If you couldn't find GAC , follow this – Gokul Commented Apr 14, 2017 at 12:56
• Also delete oracle* and policyOracle folders from "C:\Windows\Microsoft.NET\assembly\GAC_32" and "C:\Windows\Microsoft.NET\assembly\GAC_64". – Gokul Commented Apr 14, 2017 at 12:59
• Also delete OraInstall* folders from "C:\Users\<user>\AppData\Local\Temp" – Gokul Commented Apr 14, 2017 at 13:43
• @Gokul, better write: delete from folder %TEMP% which can point to different folder. – Wernfried Domscheit Commented Apr 14, 2017 at 15:58

| Show 1 more comment 7

Do everything suggested by ziesemer.

You may also want to remove from the registry:

HKEY_LOCAL_MACHINE\SOFTWARE\ODBC\ODBCINST.INI\<any Ora* drivers> keys HKEY_LOCAL_MACHINE\SOFTWARE\ODBC\ODBCINST.INI\ODBC Drivers<any Ora* driver> values

So they no longer appear in the "ODBC Drivers that are installed on your system" in ODBC Data Source Administrator

Share Improve this answer Follow edited Oct 26, 2015 at 1:20 answered Dec 4, 2014 at 5:16 ranni rabadiranni rabadi 32444 silver badges99 bronze badges 2

• Don't forget the 32 bit entry on a 64 bit Windows: HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ODBC\ODBCINST.INI\... – Wernfried Domscheit Commented Oct 14, 2015 at 7:20
• 4 Be careful with HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ODBC\ODBCINST.INI\Microsoft ODBC for Oracle. This driver is provided by Microsoft, i.e. part of your Windows installation. When you remove it you will not get it back when you make a new Oracle Client installation. – Wernfried Domscheit Commented Dec 23, 2015 at 7:32

Add a comment | 2

Do everything suggested by ziesemer.

You may also want to :

• Stop the Oracle-related services (before deleting them from the registry).
• In the registry, look not only for entries named "Oracle" but also e.g. for "ODP".

Share Improve this answer Follow answered May 5, 2015 at 8:18 Pascal SartorettiPascal Sartoretti 8155 bronze badges Add a comment | Highly active question. Earn 10 reputation (not counting the association bonus) in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.

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