The file downloads correctly and is not corrupted. What might be happening on your system, instead, might be that your antivirus has mistakenly identified the installer as a threat, and has replaced the installer with its own message page.
Be sure you turn off any antivirus before downloading.
Another possible reason, your ISP doesn't allow you to access Mediafire ( which is were we host the actual file), or you have a Mediafire account with some login problem, so you are getting some kind of warning page instead of the normal executable.