Shoutbox

It's happened a few times. A friend sends a file, it takes a very long time to send, and then guess what happens when I clikc the conversation in WLM? I get a windows error that tels me windows has decided to disable the file so I have to redownload it again because Microsoft think they can control what files go on my computer without my permission. Is there any way to fix this? I tried contacting Microsoft about it but they don't allow prouduct support for any windows version that was not bought directly from Microsoft.

edit: this is the sortof error I get http://shoutbox.menthix.net/attachment.php?pid=580434