This is an automatic translation of the original german program description, made by Google's translation service:
AVG Antivirus Free offers them protection against viruses, trojans and spyware. The starting programs, opening files and incoming e-mails are monitored by a permanent background guard for malicious code, and so their machines are safe and protected.
An additional "Search Shield" examines the links behind the search results in their Web browsers to warn them against dangerous websites. Automatic free virus updates and scheduled virus scans to make AVG Antivirus Free to a real free alternative to other more expensive anti-virus software.
