What I would like is that I can load Oracle Express the moment I need it, but have it not active on other times.
You don't specify your OS, assuming Windows (if not, please clarify) : if so, you can
- configure XE services as manual
- create two bat icons on the desktop, e.g.
- xe_start with content
net start OracleXETNSListener
net start OracleServiceXE
- xe_stop with content
net stop OracleXETNSListener
net stop OracleServiceXE