Here's an amusing one....
1.) Open an empty notepad file
2.) Type "Bush hid the facts" (without the quotes)
3.) Save it as whatever you want.
4.) Close it, and re-open it.
Anyone have a reasonable explanation on why it does this
Test your anti-virus
First, open Notepad. Then copy and paste into it the text on the line below. (It should all be on one line.)
Then select File > Save As > then save the file as eicar.com.
Also, try scanning the folder where you saved eicar.com. To see what happens...
Source: How To Test your anti-virus software