Here is the direct link to executable just in case. [1]
[1] - http://download.windowsupdate.com/c/msdownload/update/softwa...
I'm not saying that's truly what's happening, but it's easy to imagine. I'd verify I'm connecting to the right domain and double-check with e.g. VirusTotal if I were you.
Having to check because registrars are dumb has nothing to do with the fact that doing the check is easy.
Incidentally, when I copied the link out of Chrome (57) it pasted the punycode link even though it showed "apple.com" in the omnibox. So then I carefully copy-pasted just the domain and TLD to work around Chrome's link-copying magic, submitted, and... discovered that Arc punycode-ifies Unicode domains.
So that was interesting, but it kind of killed the impact of the point I was making.