I want to see a comment and I get a zip file

I have a Views block on my frontpage that shows the most recent comments. However the last two 'comments' ask me to download a zip-file (name '1663'). Of course I do not such a thing, but how do I get rid of this? When I go to the admin pages withe the comments I can simply read the comment. I have taken my site offline in order not to infect others.