Problème installation et ouverture adobe creative cloud sous windows 7 pro 64 bits

https://helpx.adobe.com/creative-cloud/system-requirements.html
-Win7 is dead https://www.microsoft.com/en-us/windows/windows-7-end-of-life-support-information
-Win8 no longer supported https://support.microsoft.com/en-us/help/4580358/windows-8-1-update

You will need to upgrade your computer to Windows 10 for most of the Adobe apps to install and work properly.

The newest version of the CC Desktop app won't install on Win 7 and there is no way to get any of the older versions of the CC Desktop app. Once that app is updated on the Adobe servers the older versions are no long available.

I moved your post over from the "Using the Community" forum, which is for getting help using this forum system, to a better forum.

In the future, So people don't have to download the image you have attached, please use the Insert Photos icon found in the Tool Bar of the Post and Reply text entry dialog window as pictured below.
Since you Can't Edit your original post to remove the Attached screen shot Please include the screen shot you attached to a new reply to this conversation by clicking the Blue Reply button under your original post and use the Insert Photos icon in the tool bar.
The Insert Photos icon is this one in the Tool Bar.

I hope this helps. Best of luck to you.