The European Institute for Computer
Anti-Virus Research
EICAR has developed a non-infectious harmless file that Norton, McAfee, and other anti-virus software vendors have agreed to return false positives for.

This file is not a virus, but can be used to test your browser's anti-virus capabilities 100% safely and effectively:

2. What does this mean?

If your browser prompted you for a file download, but did not give you a security warning, you are exposed to malicious file downloads that can potentially wreak havoc with your computer, and your private data.