I am assuming that you want to install Oracle11g on Windows 7. Here is a link to video tutorial that demonstrates how to install Oracle11g on Windows 7. Please keep in mind that you should have sufficient free disk space (~5GB), an ample amount of free memory (~2GB), and a decent CPU (~3GHz+) to install/run Oracle11g on Windows 7. Good luck installing Oracle11g and on your journey to learn all that there is to know about Oracle relational database technology.
Answer by TechTalker.