Uninstalling Oracle Database 11g XE on Windows XP (32-bit)
Uninstalling Oracle Database 11g XE is the process of removing Oracle Database XE software and the database from the machine. To remove the software and database, navigate to Start | Control Panel | Add or Remove Programs . Right-click on Oracle Database 11g Express Edition and click on Remove.
A confirmation window pops up, as shown in the following screenshot. Click on Yes to continue uninstalling:
If Oracle Database 11g XE is already running, the uninstallation process first stops the database and then proceeds with removing the database and software.