Do not open it. You can upload the download link or the file itself to VirusTotal to scan it for threats.
There are various indie games (often hosted on sites like Itch.io) or niche software tools titled "Free Will." Welcome To Free Will Free Download
Search for it on official indie databases like Itch.io. Do not open it
To provide a more specific report, I need to know exactly what you are trying to download. Welcome To Free Will Free Download
If you found this phrase on a website offering a free download of a paid product, exercise extreme caution:
Check Project Gutenberg or academic repositories.