Manually Uinstalling Oracle by Oskar0728

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									Manually Uninstalling Oracle Database
PURPOSE
-------
This article describes the procedure how to manually perform the actions to
create a "clean machine" on Microsoft Windows 95/98/NT/2000/XP and how to
manually remove all Oracle components (e.g.: oracle RDBMS database server,
IAS, OEM, client installations, etc) and services from your computer.


SCOPE & APPLICATION
-------------------
This article is intended for DBA's on the Microsoft Windows platform.

WARNING:

1. Remove all Oracle components from your computer only as a last resort,
   and only if you want to remove ALL Oracle components from your system.

2. These instructions remove all Oracle components, services, and registry
   entries from your computer. In addition, any database files in the
   subdirectories under ORACLE_BASE\ORADATA\ are also removed.

3. These procedures will also remove Oracle network configuration files,
   user written scripts and any other user generated files that may be stored
   in Oracle_Base directories.

4. Exercise extreme care when removing registry entries.   Removing incorrect
   entries can severely compromise your computer.


MANUALLY REMOVING ALL ORACLE COMPONENTS AND SERVICES FROM YOUR COMPUTER
-----------------------------------------------------------------------
Section A (steps 1-6) describes the removal of all Oracle components on
Windows NT,2000 and XP.
Section B (steps 1-4) describes the removal of all Oracle components on
Windows 95 and Windows 98.


A. Removing Components on Windows NT/2000/XP.
---------------------------------------------
To remove all Oracle components from a computer on Windows NT/2000/XP:

1.   Check privileges:
     -----------------
1.a. Ensure you are logged in as a user with Administrator privileges.


2.   Stop all Oracle services (if any are running):
     ----------------------------------------------
2.a. NT: Choose Start > Settings > Control Panel > Services.
     2000,XP: Right click My Computer > Manage > Services and Applications >
           > Services

2.b. If any Oracle services (their names begin with Oracle) exist and have
     the status Started, select the service and click Stop.

2.c. Click Close to exit the Services window.

2.d. Close the Control Panel/Computer Management window.
3.   Remove the entries in the Windows registry:
     -------------------------------------------
3.a. Start the registry editor:
     Choose Start > Run > regedit

     Note: On Windows NT you can use regedt32 instead. The searching
           capabilities of regedt32 is limited compared to regedit. It will be
           needed to be able to edit 32-bit entries in the registry. Since we
           are not going to update any 32-bit entry it is not needed.


3.b. Go to HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE
     Note the value of the key INST_LOC, this is the location of the
     Oracle Universal Installer (OUI). The default location is
     C:\Program Files\Oracle\Inventory. If this value is different, make
     note of it, so we can delete these files later.
     Delete this ORACLE key.

3.c. Go to HKEY_LOCAL_MACHINE\SOFTWARE\ODBC and expand all subkeys and
     remove all keys under here which are related with the
     "Oracle ODBC Driver"

3.d. Go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services and remove
     all keys under here that begin with ORACLE or ORAWEB.

3.e. Go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\EventLog\...
     ...\Application and remove all keys under here that begin with ORACLE.

3.f. Go to HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\...
     ...\Uninstall and remove any entries related to Oracle.

3.g. Go to HKEY_CLASSES_ROOT, remove all keys that begin with Ora or ORCL
     (e.g. Oracle..., ORADC..., ORAMMC..., OraOLE..., OraPerf... and ORCL...).

3.h. Go to HKEY_LOCAL_MACHINE\SOFTWARE\Classes, remove all keys that begin with Ora or
ORCL
     (e.g. Oracle..., ORADC..., ORAMMC..., OraOLE..., OraPerf... and ORCL...).

3.i. Go to HKEY_CURRENT_USER\Software\Oracle, delete this ORACLE key.

3.j. Go to HKEY_USERS\?\Software\Oracle, delete this ORACLE key.

3.k. Close the registry.


4.   Clean up the environment settings:
     ----------------------------------
4.a. NT: Choose Start > Settings > Control Panel > System > Environment tab
     2000,XP: Choose Start > Settings > Control Panel > System > Advanced tab >
     Environment variables.

4.b. At "System Variables" click on the variable PATH in order to modify
     the value. For example, you may see a path similar to this one:
     C:\ORACLE\ORA81\BIN;C:\PROGRAM FILES\ORACLE\JRE\1.1.7\BIN

4.c. If an %ORACLE_HOME% was installed, remove this %ORACLE_HOME%\BIN path.

4.d. If JRE was installed by Oracle, remove the JRE path.
4.e. If there is a CLASSPATH variable under "System Variables", first make note
     of the path defined, then delete it. This variable can be added back at
     a later date if needed.

4.f. Check if there are any other Oracle variables set in "System Variables",
     ORACLE_HOME, ORACLE_SID, TNS_ADMIN, JSERV or WV_GATEWAY_CFG. If these
     exist, delete them also.

4.g. Click on APPLY and OK.

4.h. Close the Control Panel window.


5.   Delete the software and icons:
     ------------------------------
5.a. NT: Choose Start > Programs > Windows NT Explorer.
     2000,XP: Choose Start > Programs > Accessories > Windows Explorer.

5.b. NT: Go to %SystemDrive%\WINNT\PROFILES\ALL USERS\START MENU\PROGRAMS
     2000,XP: Go to %SystemDrive%\DOCUMENTS AND SETTINGS\ALL USERS\...
           ...\START MENU\PROGRAMS
       Note 1: These locations depend on whether OS was upgraded from NT, or
               this was a fresh install of 2000/XP.
       Note 2: To locate your System Drive, type in DOS-box: echo %SystemDrive%
     and delete the following icons:
     - Oracle Installation Products
     - PRODUCT_NAME - HOME_NAME e.g.
          Oracle for Windows NT - Dev6i
          Oracle Reports 6i - Dev6i
          Oracle Olap Client 2.2 - Dev6i
          Oracle9i Lite
          Oracle - OraHome92


5.c. Go to %SystemDrive%\Program Files\Oracle or the location of INST_LOC as
     noted earlier in step 3.b. and delete this directory.
     Note: In order to successfully delete all files, you may have to reboot
           your computer first, in order to clear Operating System locks
           on those files.

5.d. Go to the temporary directory and delete all files and directories in here
     (see note in 5.c.).
     NT: %SystemDrive%\Temp
     2000,XP:
       %SystemDrive%\Documents and Settings\<username>\Local Settings\Temp\

5.e. Go to the drive where the Oracle software is installed on your machine
     and delete all ORACLE_BASE directories on your hard drive (see note in
     5.c.).

5.f. Close the Windows Explorer / Windows NT Explorer.


6.   Finish the removal:
     -------------------
6.a. Empty the recycle bin
     Right click on recycle bin > Empty Recycle Bin.

6.b. Reboot your computer.
6.c. Optionally: If you are on Windows 2000 or XP run the System Defragmenter
     utility:
     - from Control Panel, select Administrative Tools > Computer Management
     - expand Storage, then select Disk Defragmenter
     - highlight each virtual drive, in turn, and click Defragment
     - reboot your computer when finished.


B. Removing Components on Windows 95 or Windows 98.
---------------------------------------------------
To remove all Oracle components from a computer on Windows 95/Windows 98:

1.   Remove the entries in the Windows registry:
     -------------------------------------------
1.a. Start the registry editor at the MS-DOS command prompt:
     C:\> REGEDIT

1.b. Go to HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE
     Note the value of the key INST_LOC, this is the location of the Oracle
     Universal Installer. The default location is
     C:\Program Files\Oracle\Inventory
     If this value is different, make note of it, so we can delete these files
     later. Delete this ORACLE key.

1.c. Go to HKEY_LOCAL_MACHINE\SOFTWARE\ODBC and expand all subkeys and
     remove all keys under here which are related with the
     "Oracle ODBC Driver".

1.d. Go to:
     HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall
     and remove any entries related to Oracle.

1.e. Go to HKEY_CLASSES_ROOT, remove all keys that begin with Ora or ORCL
     (e.g. Oracle..., ORADC..., ORAMMC..., OraOLE..., OraPerf... and ORCL...).

1.f. Go to HKEY_LOCAL_MACHINE\SOFTWARE\Classes, remove all keys that begin with Ora or
ORCL
     (e.g. Oracle..., ORADC..., ORAMMC..., OraOLE..., OraPerf... and ORCL...).

1.g. Go to HKEY_CURRENT_USER\Software\Oracle, delete this ORACLE key.

1.h. Go to HKEY_USERS\?\Software\Oracle, delete this ORACLE key.

1.i. Close the registry.


2.   Clean up the environment settings:
     ----------------------------------
2.a. Open your AUTOEXEC.BAT with an editor to modify the PATH variable.
     For example, you may see a path similar to this one:
     C:\ORACLE\ORA81\BIN;G:\PROGRAM FILES\ORACLE\JRE\1.1.7\BIN .

2.b. If an %ORACLE_HOME% was installed, remove this %ORACLE_HOME%\BIN path.

2.c. If there is a CLASSPATH variable set in the AUTOEXEC.BAT, first make note
     of the path defined, then delete it. This variable can be added back at
     a later date if needed.

2.d. If JRE was installed by Oracle, remove the JRE path.
2.e. Save the AUTOEXEC.BAT file and close the edit.


3.   Delete the software and icons:
     ------------------------------
3.a. Choose Start > Programs > Windows Explorer.

3.b. Go to SYSTEM_DRIVE:\WINDOWS\START MENU\PROGRAMS
     and delete the following icons:
     - Oracle - HOME_NAME
       where HOME_NAME is the previous Oracle home name.
     - Oracle Installation Products

3.c. Go to SYSTEM_DRIVE:\Program Files\Oracle or the location of INST_LOC as
     noted earlier in step 1.b and delete this directory.

3.d   Go to SYSTEM_DRIVE:\Temp and delete all files and directories in here.

3.e. Go to the drive where the Oracle software is installed on your machine
     and delete all ORACLE_BASE directories on your hard drive.

3.f. Remove any Oracle-related .INI files that may exist in the Windows
     directory. The Windows directory may be found by entering
     "echo %WINDIR%" from a command prompt.
     Typical Oracle .INI files include ORADIM73.INI, ORADIM80.INI,
     ORACLE.INI, ORAODBC.INI

3.g. Close the Windows Explorer.


4.   Finish the removal:
     -------------------
4.a. Empty the recycle bin
     Right click on recycle bin > Empty Recycle Bin

4.b. Reboot your computer.

RELATED DOCUMENTS
-----------------
Oracle Installation Guides for Windows.
SEARCH WORDS
------------
WIN95, WIN98, WINNT, WIN2000, Windows95, Windows98, WindowsNT, Windows2000,
de-install, deinstall, re-install, reinstall

								
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