Once you have your Cubase5_Setup.exe file (size approx. 1.2GB to 1.8GB), follow this precise guide.
(for historical/educational purposes only), I can describe the typical steps a user with a valid license would follow to install Cubase 5 on Windows 7: Cubase 5 Setup Exe Free Download For Windows 7
Here is everything you need to know about setting up Cubase 5 on Windows 7, from system requirements to installation tips. Why Cubase 5? Once you have your Cubase5_Setup