Files distributed with ".7z" extensions and aggressive names like "Error killer demonic" often come from unverified third-party forums or file-sharing sites.
Because this file name includes specific versioning ("2.6") and a community-specific tag ("demonic"), its features are typically tied to: Error killer 2.6 demonic.7z
Such files are common vectors for trojans or miners. If you downloaded this from an untrusted source, it is highly recommended to scan it using VirusTotal before opening. Files distributed with "