Relying on Facebook links for security updates is highly risky . These files are often bundled with "cracks" or "fixes" that require disabling ESET's self-defense and editing the Windows Registry. This can leave your system more vulnerable than having no updates at all. The Official ESET & Facebook Collaboration
These resources are frequently used by people with computers that are entirely disconnected from the internet or by those using "cracked" or older versions (like Version 8) that no longer receive official updates. eset nod32 offline update facebook