Eck, there has been a couple of threads already in which people wondered if and why they should install WMI on Win98. Some install it, apparently for the sake of completeness. I found a page that describes quite well what it is and what is does : marebear7282 needs it suddenly and does not know why. I am afraid it is needed, to upload data, by a trojan he caught on his machine through an IE or Outlook security hole.