How to Remove the Oracle database Software manually from the windows Server

How to Deinstall the Oracle database Software manually from the Windows Server

Steps to uninstall or manually delete the Oracle DB software from the windows server:

  1. Delete the Oracle_home folder. (check the PATH from services.MSC by right click Properties)
  2. Delete the Oradata folder. (Delete all the Datafiles location)
  3. Delete the Oracle inventory folder. C:\Program Files\Oracle\Inventory
  4. Open REGEDIT and delete services present in services.MSc

Go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services

Look for Oracle Services and delete them.

  1. In REGEDIT Delete the Oracle home entry


In my case, I am having ORACLE Virtual box installed on my machine. So, I only delete key_oraDB9Home1 at location: Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Oracle

Example: Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Oracle\KEY_OraDB19Home1

6. In REGEDIT, Delete any Oracle ODBC entries. Go to HKEY_LOCAL_MACHINE\SOFTWARE\ODBC.

  1. In REGEDIT, Delete the Event log entries related to Oracle.

Go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\EventLog\Application

  1. Exit Regedit.
  2. Go to reset the Environment Variable “PATH”. Delete Oracle Software entry from PATH Variable.

Start > Control Panel > System > Environment tab OR Search environment variable.

Now remove from the environment variable.

  1. Delete Oracle entries from the Startup Menu of Windows. ProgramDATA is a hidden folder

Location PATH: %ProgramData%/Microsoft/Windows/Start Menu/Programs.

Example: C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Oracle-OraDB19Home1

Note: If not found then open the startup menu and go to the item and right click on it and go to the location.

  1. Remove Oracle Group created during installation from windows.

Open lusrmgr.MSC –> open Local Users and Groups” window –> Go to Groups and delete all related to Oracle Started with ORA_

12. Finish the uninstalling process of the Oracle Database.