Manually uninstall Oracle in Windows

There are two problems with uninstalling the Oracle Al Installer that comes with Oracle:

1) Slow speed;

2) not clean; not completely; there are some residual registries that will affect subsequent installation.

Therefore, we recommend that you manually uninstall Oracle.

1. [win + R]-> [services. msc] to disable all oracle services.

2. Open the registry [win + R]-> [regedit ]. Open Path: HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Services \ delete all service names starting with oracle in this path. This key identifies various Services registered by Oracle in windows!

3. Open the registry and find the path HKEY_LOCAL_MACHINE \ SOFTWARE \ ORACLE to delete the oracle directory, which contains the SOFTWARE installation information of the Oracle database.

4. Delete the registered oracle event log. Open the Registry HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Services \ Eventlog \ Application to delete all items in the registry that start with oracle.

5. Delete the oracle content in the environment variable path. Right-click my computer> Properties> advanced> environment variable> PATH variable. Delete the content of Oracle in this value. Note: A Bunch Of Operating System directories are recorded in the path. In windows, directories are separated by semicolons (;). Note the following when deleting directories. Suggestion: When deleting the Oracle value in the path environment variable, copy all the values to the text editor, find the corresponding Oracle value, and then copy the modified string, paste it to the path environment variable, which is relatively safe.

6. Restart the operating system.

7. After the operating system is restarted, all Oracle-related processes will not be loaded. Delete all data under Oracle_Home. (Oracle_Home refers to the installation directory of the Oracle program)

8. Delete the oracle directory under C: \ Program Files. (This directory depends on the path of Oracle Installation)

9. Delete oracle items under the Start Menu, for example, C: \ Documents and Settings \ All Users \ "start" Menu \ Program \ Oracle-Ora10g. If you do not delete the Oracle related menu directory under the Start menu, it does not affect the re-installation of Oracle. When Oracle is re-installed, the menu will be replaced.

So far, Oracle is completely uninstalled on Windows.