Ok, this is a good thing to remember. Never EVER use another main language to the OS than english!
My problem was that I got Swedish Windows installed on the computer and because of that all settings saying that administrators had access rights were wrong, I had to add Administratörer to the list..
I have just got a new developer computer and suddently I do not see CMO in the navigation and if I try to go to the url I get an access denied.
I checked and I am logged in as a domain user and domain users are in the local adminstrators group so I should have access.
Anyone seen this behavor?