In SharePoint 2010 and 2013, it is a bit tricky to find the list of features to activate or deactivate so I thought I’d leave some breadcrumbs here for folks to follow:
In Central Admin click Application Management > Manage Web Application then click the relevant Web Application name to highlight it. Finally, in the ribbon, click Manage features.
In Central Admin click Application Management > Manage Web application features
If you can’t find the feature you are looking for in these lists, you have either:
Not installed the feature
Installed a feature scoped at a different level (i.e. not web application scope).