Zune Thoughts: Trouble Installing Zune 4.7 Software? Try a Manual Download

I've just spent the past 10 minutes fighting with the installation of the Zune 4.7 desktop software on one of my computers; the upgrade, which comes via Windows Update, worked smoothly on all of my other computers, but on this one computer, it kept failing. More irritatingly, the URL the Zune software installer gives me for more information isn't neither clickable, nor is it possible to copy and paste it. I attempted the first install, and when it failed, I rebooted my PC and tried again. It failed again. I rebooted again, and this time I went to Zune.net and downloaded the 4.7 software directly - and the install worked. A bit odd! I had hoped the Zune software had evolved beyond the point of random install failures, but it seems it still has a way to go yet.