There's been a problem getting the machine to complete the updates for a few years, it's like a tradition. And now the fallback page for those like me is gone as far as I can tell. XP, internet explorer 8, avira & comodo which I've tried disabling with no improvement to the download process.
If you're having trouble installing Adobe Flash Player, try downloading the installer directly from the following link:
Save the file, close Internet Explorer, and then run the installer.