小红伞 （Avira）是来自德国的著名杀毒软件厂商，有20余年的系统安全软件开发历史，其Avira AntiVir Personal版杀毒软件完全免费提供使用，很有名气！还免费提供几个实用的电脑工具软件。遗憾的是目前官方仅有英文版和德文版，还没提供中文版。
Avira AntiVir Personal - FREE Antivirus
Avira AntiVir Personal - FREE Antivirus is a reliable free antivirus solution, that constantly and rapidly scans your computer for malicious programs such as viruses, Trojans, backdoor programs, hoaxes, worms, dialers etc. Monitors every action executed by the user or the operating system and reacts promptly when a malicious program is detected.
Avira AntiVir Personal is a comprehensive, easy to use antivirus program, designed to offer reliable free of charge virus protection to home-users, for personal use only, and is not for business or commercial use. Available for Windows or UNIX.