How to deistall em in windows

Question

I have deinstalled the em but windows registry still have oracle entry. Can someone direct me on this how to properly deinstall the entire em from windows.?

Answer 1

This is expected. Follow the below steps to deinstall the oms
Shut down all opmn processes that are running by running the following command:
<OMS_HOME>/opmn/bin/opmn stopall
Shut down the Management Agent in the Agent Oracle home using the emctl stop agent command.
Stop Grid Control by running the following command:
<OMS_HOME>/bin/emctl stop em
Shut down the repository database (if the database software is installed as a part of the Management Service Oracle home being uninstalled).
Shut down the Oracle Database listener.
Run the Database Configuration Assistant (DBCA) to delete the database before proceeding to deinstall the Oracle home.
Run the OUI and select the Oracle home to deinstall. It is removed from the Central Inventory. When you invoke OUI, pass the -removeallfiles parameter.
For UNIX platforms:
./runInstaller -removeallfiles
For Microsoft Windows platforms:
setup.exe -removeallfiles
Caution:
After deinstallation of certain Grid Control targets, when you try and remove the same targets from the Grid Control console, you may encounter an error.
To resolve this issue, deinstall the Grid Control targets and wait for at least 15 minutes before you attempt to remove the targets from the Grid Control console using the Hosts screen.
Additional Deinstallation Steps
For deinstalling Grid Control from Microsoft Windows operating system, you will need to perform the following additional steps to remove entries from the registry. Ensure that you are logged in as a user with Administrator privileges on that computer.
Remove Entries in Windows Registry
To remove entries in Windows registry:
Start the registry editor. Choose Start > Run > regedit.
Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\
Go to HKEY_LOCAL_MACHINE\SOFTWARE\ODBC and expand all subkeys and remove the key "Oracle in <HOME_NAME>". Check if the "Oracle ODBC Driver" key contents refer to the ORACLE_HOME to be deleted. If yes, delete the key.
Go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services. Delete the keys that begin with Oracle.
Go to HKEY_LOCAL_MACHINE\SYSTEM\ControlSet2\Services. Delete the keys that begin with Oracle.
Go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\EventLog\...\Application. Delete the keys whose names begin with Oracle and contain references to the EventMessageFile string entry for the ORACLE_HOME to be deleted or a location under it.
Go to HKEY_CLASSES_ROOT and search in the keys starting with Ora or ORCL (for example, Oracle..., ORADC... ..., OraPerf..and ORCL...). Delete keys which include string values with the specific ORACLE_HOME that is to be deleted.
Close the registry editor.
Clean Up Environment Settings
To clean up environment settings:
On Windows NT: Choose Start > Settings > Control Panel > System > Environment.
On Windows 2000 and Windows XP: Choose Start > Settings > Control Panel > System > Advanced > Environment Variables.
In the System Variables section, click the variable PATH in order to modify the value. For example, you may see a path similar to this one:
C:\ORACLE\EM10g\BIN
C:\PROGRAM FILES\ORACLE\JRE\1.1.7\BIN
If you are deleting the Oracle home C:\ORACLE\EM10g, remove the C:\ORACLE\EM10g\BIN expression from the PATH variable.
Delete any path expression in the PATH variable that contains the Oracle home to be removed or some location underneath.
If there is a CLASSPATH variable under "System Variables", delete the path expressions in the variable that contains the ORACLE_HOME to be removed or some location underneath.
Check if there are any other Oracle variables set in "System Variables". Delete those variables that contain the ORACLE_HOME that you are trying to remove. For example, ORACLE_HOME, ORACLE_SID, TNS_ADMIN, inventory_loc, and so on.
Click Apply and then click OK.
Close the Control Panel window.
Delete Software and Start Menu Icons
To delete software and start menu icons:
On Windows NT: Choose Start > Programs > Windows NT Explorer.
On Windows 2000 and Windows XP: Choose Start > Programs > Accessories > Windows Explorer.
On Windows NT: Go to %SystemDrive%\WINNT\PROFILES\ALL USERS\START MENU\PROGRAMS
On Windows 2000 and Windows XP: Go to %SystemDrive%\DOCUMENTS AND SETTINGS\ALL USERS\START MENU\ ...\PROGRAMS
Note:
These locations depend on whether the operating system was upgraded from NT or was a new install of Windows 2000 or Windows XP.
Delete the folders -Oracle - <HOME_NAME> where <HOME_NAME> is the Oracle home that you are trying to remove.
Note:
To locate your System Drive, type echo %SystemDrive% in the Command Prompt.
Go to the temp directory and delete all files and directories at the following locations:
On Windows NT: %SystemDrive%\Temp
On Windows 2000 and Windows XP: %SystemDrive%\Documents and Settings\<username>\Local Settings\Temp\
Reboot the machine.