You have a great, big, fat pipe for plenty of download (DL) bandwidth.
I envy you
But your problem is maybe using win to manage a DL. Although it should
"just work". We can't really help you here (because we are mostly, running linux).
Where are you trying to DL the distro from?
Maybe the site is broken. There are many alternatives.
If you have DL'd knoppix, try booting from that ( first, check if your employer allows this sort of behaviour from "work" ), and then asking knoppix to DL the files for you. Maybe you'll have success.
If not, post here again, and we'll all do our best to help you.
Welcome to LQ!