Hi, When i close iexplore on windows 98 I get an iexplore caused and invalid page fault in rpcrt4.dll. If I disable Imon and reboot the problem does not occur. This took me a while to narrow down and I have tried every other suggestion on the net for fixing the problem. It has to be something with Imon or the way it is registered to cause this problem. Can anyone suggest a fix because I really want inline mail scanning to work. thanks, Craig.