Remove Oracle 11g Completely from your Machine

Uninstall Oracle from your Machine Completely

Please follow these steps to remove oracle completely..

1. In the Windows Control Panel, select Add or Remove Programs.
2. Select Oracle Database 11g Express Edition.
3. Click Change/Remove.
4. In the Oracle Database 11g Express Edition - Install Wizard, select Remove, click Next, and then click Yes in the confirmation window. When the deinstallation completes, click Finish.

Step 1: Open Services in your Windows by typing services.msc in run (Windows + R)

Step 2 : Stop all Services that starts with ORACLE/oracle.

Step 3.Exit services.msc.

Step 4:Again On run ,Type : Regedit and enter

Step 5:Remove these enteries :

HKEY_CURRENT_USER\SOFTWARE\ORACLE
HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet Services\EventLog\Application\Oracle.oracle
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet Services\OracleDBConsole
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet Services\Oracle…
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet Services\OraclService

Step 6 : Reboot your System

Step 7 : follow Step 1 and copy all the service name that name starts with Oracle

1.Open Command Prompt (run as Administrator)

2 Type SC delete servicename 

Step 8 : Delete all Folders in C: Drive start with Oracle

mainly Oraclexe,etc…in Program files.

Step 9 Reboot Your System

Step 10:Congrats ! Oracle Uninstalled Successfully.