EasyMiner needs the Microsoft .NET runtime in order to run; works with .NET 2.0, but might as well install the latest (.NET 4.0) and you should be good to go.
It loads fine, but doesn't recognize the BFL or the drivers aren't right. The BFL never shows up in the list.
Sounds like you are missing the FTDI driver for the virtual COM port, and you don't have driver auto-download enabled in your Win7 installation.
Note that this driver is NOT packaged with Windows, but is downloaded automatically by Windows Update as soon as the device is detected. The problem is that, by default, new Windows installs do not have this feature enabled.
Unplug your Single, enable the driver auto-download feature in Windows, reboot, and plug the Single back in. Windows should then detect it and download the driver automatically from the Windows Update server.