Hmm, thanks for tagging me. I'm sorry you're running into issues.

We've seen some issues with the Prereq Installer being unable to download the vcredist.exe, but don't know why that was (theory is antivirus / firewall kicking in).  That doesn't sound like this though.  I'm not aware of any 404 issues with the Task Scheduler.

I'm following up with the engineers and the ops team to see if anyone else is aware of an issue. In the meantime, I'll do so more research and get back to you.