Install the composer utility on your windows machine (easy). Seriously, the composer utility is the only way. With Drupal 8, the only reasonable way to update the code is with the composer utility.
You can't use the Drupal 7 style update procedure to update a Drupal 8 code installation. But if I can figure out how to recover my first site, I won't lose my progress on Acquila's YouTube tutorial. I have a second site here that I made when trying out Acquia's Lightning package which still works. But all I get from my site is 500 Internal Server Error. Thought I could reverse my damage be shutting down Apache and MySQL again, changing the name of ~Sites\devdesktop\drupal-8.3.1 to drupal-8.3.1bad, changing the name of ~Sites\devdesktop\drupal-8.3.1-Copy back to drupal-8.3.1, and restarting Apache and MySQL. Then I thought I should have followed the instructions at. I made a backup copy of everything in ~Sites\devdesktop\drupal-8.3.1, went into maintenance mode, used Dev Desktop to stop Apache and MySQL, then copied everything except sites from the 8.3.4 zip download to ~Sites\devdesktop\drupal-8.3.1, but the site wouldn't come back up.
I kept getting messages on my Acquia Dev Desktop 2 installation of 8.3.1 on Windows 10 that there were critical updates needed.
