I disabled some modules in backend in System > configuration > Advanced > Advanced
Then I logged out and login and then some default magento menus are not visible.
Please have a look at core_config_data table view after searching for all modules for their enabled status:
core_config_data
WHEREpath
LIKE '%advanced/modules_disable_output/%' ORDER BYpath
ASC – Mohit Kumar Arora Jul 6 '16 at 6:34