I would expect the web site it is pointing at is no longer there. Asus probably took it down. 404 error is what you get when the URL used doesn't have a web site attached to it.
It existed at launch of win 10, expect its just part of the Asus driver package loaded off windows update when you first install win 10. I may actually have it on my other user, i didn't look. It wasn't very useful.
I would expect the web site it is pointing at is no longer there. Asus probably took it down. 404 error is what you get when the URL used doesn't have a web site attached to it.