Photoshop won't complete installing just says "FINISHING" for the last two hours

Mac or Windows, and EXACTLY which version of the operating system?

Recent Mac AND Windows operating systems have been known to cause "odd" problems

Please read https://forums.adobe.com/thread/1499014

-try some steps such as changing browsers and turning off your firewall

-also flush your browser cache so you are starting with a fresh browser

-check hosts file for blocked entries https://forums.adobe.com/thread/1912777

http://myleniumerrors.com/installation-and-licensing-problems/creative-cloud-error-codes-wip/

https://helpx.adobe.com/creative-cloud/kb/creative-cloud-desktop-application-failed.html

http://helpx.adobe.com/creative-cloud/kb/failed-install-creative-cloud-desktop.html