Re: Command and Conquer Ultimate Collections - Fatal Error: String Manager failed to initialize properly

What did you run as admin? Origin? Or each game's launcher? Try running the launchers as admin if you didn't.

Just in case: The launchers are inside each game's root directory.

Running as admin worked for some people, but it may also be caused by Windows' UAC blocking access to certain files. Are you the admin on the specific PC and logged in as such? Alternatively you can try disabling UAC in: "Control Panel" -> "User Accounts" -> "change User account settings" just to test (although I didn't need to do this as a permanent solution)