Nobody can tell you anything without proper system info or other technical details.
Sorry for poor info.
So, some days ago I have installed Creative Cloud to my Windows 7. Then I picked up Premiere to try using it in trial period. Installation went fine, at least it seems fine. Then when I wanted to start Premiere from Creative Cloud desktop windows, nothing happened. Then I typed "adobe" in my start menu and Premiere didn't appear. I tried to find it in "Program files", still nothing. Then when I went on "Uninstall programs" in my "Control panel" - there it was! And I deinstalled it. After I installed it again from Creative Cloud windows. Same problem. Then I reinstall from the begining: first Creative Cloud then Premiere again, still same problem! I visited 100 forums but I just didn't find anybody haveing same problem.
I hope I replied well now.
Thank you very much for help.