Updating Photoshop v 21.1 stops at 37%

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

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.

Larsa74733870, sorry you are encountering errors while updating Photoshop CC.  Please check the log files to determine why the update is failing. You can find information on how to locate the fatal errors within the log files at  https://helpx.adobe.com/creative-cloud/kb/troubleshoot-download-install-log-files.html.