Hyper-V isn't available on Windows 7 client SKUs, like Enterprise. It's only available on Windows Server 2008 x64 (some SKUs), Windows Server 2008 R2 (most SKUs), Windows 8 Professional x64, Windows 8 Enterprise x64, and Windows Server 2012 (again, most SKUs).
You've just installed the management tools which allow you to manage a remote instance of Hyper-V.