502 error code when using creative cloud to download photoshop

overview:

adobe subscriptions don't use serial numbers so you should uninstall whatever you've recently installed from adobe that's triggering that error message, and then you should clean your computer of adobe files before restarting the installation process.

specific step-by-step instructions to be followed meticulously:

so, first if you installed the cc desktop app, follow each applicable step.  some (like uninstall cc apps won't apply to you if you installed none):

uninstall every cc app including preferences, https://helpx.adobe.com/creative-cloud/help/uninstall-remove-app.html

then uninstall the cc desktop app, again using the correct uninstaller, https://helpx.adobe.com/creative-cloud/help/uninstall-creative-cloud-desktop-app.html#sa_src=web-messaging

clean your computer of cc files per http://www.adobe.com/support/contact/cscleanertool.html
check for, and if available, update your os

repair all ms visual c++ versions that can be repaired.

update your ms visual c++, if it can be updated

restart your computer (don't skip this)

reinstall the cc desktop app, using the "alternative download links" at the bottom of the page at https://helpx.adobe.com/download-install/kb/creative-cloud-desktop-app-download.html

use the desktop app to install your cc programs/trials