I was under the impression that PortableApps do not leave any traces whatsoever behind on the host machine. I did a little browsing today and found in DocumentsandSettings/myname/localsettins/temp/ many, many folders, and inside those folders were a couple of dll files and a jpeg. The jpeg showed the splash screen of one of my apps. Several of the folders were for Keeppass, several for Firefox, several for Songbird, and I don't know what all else. What are these files that are being left behind? I'm on a W2K machine without administrator rights. Thanks guys.