Windows7, completely, completely uninstall oracle____oracle

Instructions on how to uninstall Oracle completely on the WINDOWS7 platform.

Because Oracle has some trouble uninstalling under Windows, if a full uninstall is not possible, it may affect future reinstallation. The general uninstall method is to run Oracle's own uninstall program, unfortunately I can not completely uninstall the uninstall, when I install Oracle again, there will be inexplicable problems, and this uninstall is more cumbersome, relatively slow, Here's a quick and easy way to uninstall Oracle.

1. Turn off all Oracle services. Can be shut down in Windows Services Manager;

2. Open the registry: Regedit Open the path:
hkey_local_machine/system/currentcontrolset/services/
Deletes all Oracle-initiated service names under this path, which identifies Oracle's various services registered under Windows.

3. Open the registry and locate the path:
Hkey_local_machine/software/oracle

Deletes the Oracle directory, which registers software installation information for the Oracle database.

4. Delete the registered Oracle Event log and open the registry
Hkey_local_machine/system/currentcontrolset/services/eventlog/application

Deletes all items in the registry that begin with Oracle.

5. Delete the content about Oracle in the environment variable path.

Right-click My Computer--> Properties--> Advanced--> environment variable-->path variable.

Deletes Oracle's content in this value. Note: A directory of operating systems is recorded in path, separated by semicolons (;) between directories in Windows, and noted when deleted.

Recommendation: When deleting a value for Oracle in the PATH environment variable, copy the value to a text editor, find the corresponding Oracle value, delete it, and then copy the modified string and paste it into the PATH environment variable, which is relatively safe.

6. Restart the operating system.

After the 1~5 steps are completed, restart the operating system.

7. Various Oracle-related processes are not loaded after restarting the operating system. This deletes all the data under Oracle_home. (Oracle_home refers to the installation directory for Oracle programs)

8. Delete the Oracle directory under C:/Program files.

(This directory depends on the path to Oracle installation)

9. Delete the Oracle entry under the Start menu, such as:
C:/Documents and Settings/all users/"Start menu/program/oracle-ora10g

Different installation This directory is slightly different.

If you do not delete the Oracle related menu directory under the Start menu, this does not affect the installation of Oracle again. When Oracle is installed again, the menu is replaced.

At this point, Oracle is completely uninstalled under the Windows platform.