Uninstalling Reporting Services

Nice little problem here :x
Someone installed our DEV servers with French as the regional setting. Because my colleague and I don't like French (on a computer) we decided to change it to English. We had to uninstall RS to start with a fresh installation but that wasn't what RS wanted. The uninstall attempt just gave a message box "Fatal Installation Error". Very descriptive as an error :( When uninstalling from the setup.exe we would just get 1603 as an error code.

Reinstalling the French regional setting solved the problem. Uninstalled RS, uninstalled French and installed RS again.

Voulez-vous supprimer l'application?