I have windows 2000 in a 1200 mhz dell computer that I want to use Mach2 with..I don't have the Windows 2000 disc to do a clean install so my question is does everything need to be turned off when I CTL,ALT,DLT...or should something need to keep running............also on a Taig Mill how do you home out with no limit switches...do you use safe Z.....Thanks... :cheers: