FCK wants to install files from MS Office

I have seen this behavior before, but recently I was doing a demo at a client site, and EVERY time I loaded a page with the editor on it, it prompted to install software from Powerpoint and asked to insert the MS Office installation CD.

What the heck is it trying to do? And Why? And hohw can I stop it? You can't even cancel out, it loops.. the only way to get out of the loop is to use the X to close the windows, and you have to do that several times.