How to Make a virus and Test Your Anti-Virus that whether it is working properly or not?(Windows XP,Vista,7)

Some times we face a problem like our anti virus is not showing virus during scanning but we face various problem that may be due to present of virus. In that case we should check our Anti-Virus program that whether it is working or not.

Procedure:

1. Open your notepad or word pad or any other text editor what you have.
2. Copy the following bolded text

X5O!P%@AP[4\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*

3. Now save the text editor file and give it a .exe extension. (Suppose virus.exe)
4. If your antivirus detect it as a virus then it is properly working.
5. If no then it is not properly working or corrupted or the validity of the antivirus has expired. So better to change the anti virus to keep your system secure from malware or virus.