Basic Oracle Concepts and Programming Question:

If you want to shutdown your 10g Express Edition server, go to the Services manager in the control panel. You will a service called OracleServiceXE, which represents your 10g Express Edition server.

Select OracleServiceXE, and use the right mouse click to stop this service. This will shutdown your 10g Express Edition server.

You can also shutdown your 10g XE server through the start menu. Select All Programs, then Oracle Database 10g Express Edition, and then Stop Database.