"adobe illustrator"

See here:
https://helpx.adobe.com/creative-cloud/kb/creative-cloud-desktop-app-installation-stuck.html
https://helpx.adobe.com/creative-cloud/kb/stop-responding-downloading-apps.html
https://helpx.adobe.com/creative-cloud/kb/troubleshoot-install-logs-cc.html
https://community.adobe.com/t5/get-started/updating-adobe-creative-cloud-stuck-at-39/m-p/10916241?page=1
https://helpx.adobe.com/creative-cloud/kb/creative-cloud-app-doesnt-open.html
I had a similar issue.

Make sure that you have all Windows updates that are available.

The one thing that was causing it for me, believe it or not, was that I needed to do a clean installation of the latest Studio graphics driver from the NVIDIA website. After doing that and restarting, all was OK.

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

then uninstall the cc desktop app, https://helpx.adobe.com/creative-cloud/help/uninstall-creative-cloud-desktop-app.html

clean your computer of cc files per http://www.adobe.com/support/contact/cscleanertool.html

restart your computer (don't skip this)

reinstall the cc desktop app, https://creative.adobe.com/products/creative-cloud.

if you're unable to install the cc desktop app at this stage, use an administrator account (solution 4 here, https://helpx.adobe.com/creative-cloud/kb/creative-cloud-missing-damaged.html)

use the desktop app to install your cc programs/trials