You will need to have the Quicktime software installed on your computer in order to view any Quicktime files. Many Windows and Macintosh computers come with Quicktime preinstalled.
If Quicktime is not installed on your system (or if you are not certain that it is installed), you can download it for free from Apple’s website (you will be prompted to choose the correct version for your operating system).
The instructions on Apple’s website and within the Quicktime software installer should help you with installation.
Having trouble with the Quicktime Software? Visit Apple’s Support Center for technical support.