Perhaps that was it. We ran Netscape on Win95. We didn't have Win98, so I don't have any firsthand knowledge of the issue. I do know, however, that Firefox 1 and 2 would not work on Vista. They would load just fine, but they could not be opened. Vista wouldn't even offer an explanation as to why. Everything would seem to run just fine, but that Firefox wouldn't run. Firefox 3 seems to be just fine, though.