Yeah, for some reason, every time I download something from HPC: Factor, none of my browsers know what the file size is. Yet, it always finishes downloading fine and I see the file the folder it downloaded to. But instead of seeing something like "34% remaining", it just says that it is an unknown size and tells me how much the browser has downloaded already; that number may be the
random numbers. Just be patient and check your downloads folder after the windows goes away, but don't close it. I've downloaded ActiveSync from here and it worked fine for me.
