The safest way to get older versions is through official channels. Using third-party sites can expose your network to tampered installers or malware.
Run the legacy application inside a lightweight virtual machine (VirtualBox, VMware) with a modern host OS protected by the latest ESET. The VM can be air-gapped or limited to internal network only.
Before proceeding, you must weigh the risks. Running an old version of ESET Endpoint Security introduces severe vulnerabilities:
Use the ESET Knowledgebase KB2885 for direct links to offline installers . ⚠️ Important Considerations Old Version Endpoint Antivirus Download