Right-click the setup.exe and select "Run as Administrator" to ensure Windows allows the registry changes.
Cubase 5 was released during a transition period in computing. While there is a 64-bit version of the Cubase 5 installer, the software itself was primarily designed for 32-bit architecture. cubase 5 setup exe free download 64 bit hot
Old software looks tiny on 4K monitors. Right-click the desktop shortcut > Properties > Compatibility > Change high DPI settings > Override high DPI scaling behavior. Are you trying to recover old project files , or Right-click the setup