Here are some codes that can test whether your anti-virus software works or not.
How to test:

1 Creat a new text file, paste the following code into it:
X5O!P%@AP[4PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*

2 Save the file as a .com file or other types of file.

3 Mail the file to yourself (Or you can compress the file as a .zip), you can also test your desktop scanner by right-click the file to tell the scanner to scan away.

Well, I just tested this, It proved that Kapasky works fine. As soon as I save the code as a text file（Not a .com file yet), the kapasky warn me of the "virus" and remind me to delete the file.

This codes are fromlifehacker

测试杀毒软件是否工作的代码：

1 新建文本文件，将如下代码拷进去
X5O!P%@AP[4PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*

2 另存为.com文件或者其他文件。

3 通过邮件发送给自己（测试下邮件提供商的安全性），也可以右击文件用你的桌面杀毒软件进行扫描。

该代码无害（本人测试过了），来自lifehacker

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