content: It is to convert a pc into a router. You can use any old pc hardware laying around and just throw in some network cards and install it like any other os. Though if you are concerned with power draw you may want to get a small formfactor barebones pc like the Shuttle XPC Slim DS77U which is fanless and low power draw. Basically the idea is you run this as your primary router to protect your home network from outside threats (and it auto updates firmware in the background) and use your old wifi router as basically just an access point for the wifi aspect of your network.