I have mailed avast with this question before,…they said a jpg itself cannot be infected,…but a script and/or trojan horse/worm virus can be attached to it,…so it seems harmless at first,…

The link i sended: http://www.museen.org/janina.jpg

DO NOT CLICK THE LINK :smiley: - if you open this with IE it does something to your Windows Media Player,…opening this with mozilla firebird gives you the pop up that the file is corrupted,…