All the sound samples are installed on my Windows computer, but I still don't hear anything.

Windows computers come with a very wide variety of internal components. Unfortunately, some of the lower end models ship with sound cards that are insufficient to run our software. Our recommended solution is to acquire and use an external audio device, or simply use another computer with better built-in components. For our recommendations on audio devices and computers, look for the "computer" and "sound" sections on our hardware recommendations page.