Can you share a screenshot of the error, what version are we discussing / installing? General steps on installation and how to troubleshoot can be found at: Troubleshoot Creative Cloud download and…

Hi AAKS,   Can you test with a different browser? Maybe the adobe domain is blocked at your machine you can check for example: Sign in, activation, or connection errors | CS5.5 and later. You can…

You can download it from: Download CS5.5 products

Hi macpro2007,   Sorry to hear you experience so much issues downloading and installing the CC software!   Can you check what's the download speed of your internet connection? Speedtest.net by…

Hi Shyra,   The solution to this error is not documented so there is no document to use to solve the issue. I would suggest to share the error log. Does this error occur while downloading updates? …

I would double check if you have sufficient rights on your user profile (check step 3 of the KB). Most Cloud Desktop issue can be resolved with the following steps: Error "Failed to Install" Creative…

As you state the issue is with the Creative Cloud Desktop upgrade installation I would suggest to perform the steps: Error "Failed to Install" Creative Cloud Desktop application Good luck!

Hi jamtart161,   There is a general troubleshoot available: jTroubleshoot Creative Cloud download and install issues Easy step to test, see if it installs on a new user account, if not please re…

Hi Deto,   A new KB is live on this topic: App doesn't open | Progress wheel spins continually - http://helpx.adobe.com/creative-cloud/kb/creative-cloud-app-doesnt-open.html Hope this will get you a…

Good luck, that a lot of pages. What is your question?

Hi J-marshall,   You can have 2 versions installed aside of each other. Bot programs have their own folders. The files from CS4 can be read by the CC version. The other way around does not work for…