Joomla Extension Manager - Sub menu missing

We are having an issue uninstalling a component in Joomla Extension Manag开发者_Python百科er but just realised the sub menu [Install | Component | Modules | Plugins | Languages | Templates] is missing.

Any ideas as to why this maybe? Your responses are appreciated in advance.

Thanks IMVBank

The most obvious thing to check would be your admin level. You have to be an Administrator or Super Administrator for the Extensions menu (where Install is located) to even show up. If you're a Manager or lower, you won't have access.