Turns out the issue was just not enough hard drive space. It continues to astonish me just how space-hungry Windows is getting. I had 20 GB free and it wasn't enough,, after I freed another 20 GB...

I'm having the same problem. I've tried 3 times now to let it restart for the install (3rd time it just randomly tried to install at 7:15 PM today and closed everything without warning even though...