I'm a newbie to it all... just acquired a new CNC 3Kw spindle commercial router (just off the boat) for experimental production machining in aluminum. I've got a variety of computers (all operable) of various ages and operating systems etc, that had been replaced by newer, faster machines. I wonder if someone could refer me to a post or other source that describes an appropriate, optimum machine that I could to dedicate to Mach3, given the desirability of a parallel port for a quick start with perhaps something other than Vista as an operating system. I'd like to know whether processor speed is more significant than memory in an older machine, whether XP is better than 95 or 98 to run the router, etc. Seems sensible to wipe the hard drive clean, keep it away from the Internet, load Mach3 and maybe transfer G-code via floppy disk, flash drive or whatever, and keep it in the shop as a single-purpose computer. Would really appreciate some guidelines for computer selection.