First, I need to recall if ESET offers free license keys. From what I know, ESET usually provides free trials for their antivirus, but not permanent free licenses. They do have a free version called ESET Free Antivirus, which might be available for download on their official site. The paid versions are ESET Smart Security and ESET NOD32 Antivirus Standard, which require purchasing a license key.

Another angle: the user might have shared a link for a free key on Facebook, expecting others to access it, which isn't legitimate. I need to clarify that sharing keys is against the law and encourage purchasing through official channels. Additionally, suggest alternatives like ESET's free antivirus or other reputable free antivirus programs.

Then there's the Facebook link part. Scammers often use social media platforms to distribute malicious links disguised as giveaways or free software. The user might have encountered such a link on Facebook and wants to report it. It's important to warn them about the risks of following such links, like phishing or malware infections.

The user might be looking for a way to get a license key for free, possibly through promotions or Facebook. However, distributing or sharing license keys without proper authorization is against the terms of service for most software companies. So, even if someone has a key, sharing it would be illegal.