To enable a module:

1. Navigate to Extensions-> Plugin Manager in the Joomla global menu. The Plugin Manager page appears, as shown in the following figure:


2. Select the check box [1] corresponding to the plugin you want to enable and click on the Enable button [2], to disable plugins you need click on Disable  button [3]. Plugins status displayed in "Enabled" column, [4] - means disabled status and [5] - enabled status. Also you may change plugin status one by one clicking on the [4] and [5] buttons.