Cannot connect to local db

I am in a Supply Chain Masters program and need to install the Excel Data Mining add-in for Excel. I downloaded and installed Microsoft® SQL Server® 2012 SP1 Data Mining Add-ins for Microsoft® Office® . This package includes two add-ins for Microsoft Office Excel (Table Analysis Tools and Data Mining Client) and one add-in for Microsoft Office Visio 2010 (Data Mining Templates). The add-ins are supported on Office 2010 and Office 2013. Once installed, I cannot connect to *localhost*. I run two separate accounts: an admin account and a regular account. I've tried starting the service and it doesn't work. I've tried to uninstall and reinstall several times. Any help would be greatly appreciated.