How Oracle completely removes clean

2. When Oracle is installed, the specified SID already exists on this computer if it appears. Such an error. This is the second time you've installed your Oracle, and the error is that you didn't have to clean up the original stuff about Oracle, so let's start with a thorough uninstallation of your Oracle.

4. 2

   Start your computer → manage → services, then turn off all of your Oracle's related services

6. 3

   Open the Start menu and locate the Oracle root directory

8. Select the universal installer in the ground and open it.

10. After entering the following icon, select Uninstall Product

12. Note that after you click Uninstall a product, all of the parent subclass options here must be selected. Then uninstall, of course, after the uninstallation is complete, your Oracle has not been uninstalled.

14. Next we need to take the following important three steps:

    Run regedit, select hkey_local_machine\software\oracle, and press the DEL key to delete the entry.        Run regedit, select hkey_local_machine\system\currentcontrolset\services, scroll through this list, and delete all Oracle portals. Run RefEdit,hkey_local_machine\system\currentcontrolset\services\eventlog\application, delete all Oracle portals.

16. Immediately thereafter. Right click on My Computer, click Properties, then go to the list below and click Advanced system Settings

18. After entering the following interface, select environment variable

20. Locate a path, and then double-click

22. Delete all environment variables about Orale in the inside

24. Then go to the installation directory of your Oracle database and delete the directory folder. Then restart your computer and install it again.

26. When installing Oracle again, try to install and compatibility with the administrator as much as possible, and the above methods hope to help you.

How Oracle completely removes clean