Avira offers both signature-based and [[heuristic]] (AHeAD) detection. In more expensive versions, it also offers system optimization features and file encryption. It also offers cloud protection, which means suspected files may be uploaded and examined by this cloud.<ref>http://www.avira.com/en/personal</ref> | Avira offers both signature-based and [[heuristic]] (AHeAD) detection. In more expensive versions, it also offers system optimization features and file encryption. It also offers cloud protection, which means suspected files may be uploaded and examined by this cloud.<ref>http://www.avira.com/en/personal</ref> |