If you want to play old PC games on your new PC, the go-to option is a thing called DOSBox. It gets the job done, but it can be a little fiddly. D-Fend Reloaded, on the other hand, is a breeze.
It's the latest release of a popular front-end for DOSBox, taking the trusty old PC emulation program and making it easier to understand and easier to use. For hardcore users this has probably never been an issue, but for the more casual gamer, the type who only wants to fire DOSBox up every few months to play some X-Wing or X-Com, it's a great addition to your desktop, as it simplifies and streamlines a lot of the more complicated aspects of DOSBox in a more user-friendly interface.