I wonder if I have enough HP to run Mach3 on this PIII 1GHz laptop. I had Mach2 up and running, and then as you did Chuck, I tried upgrading to Mach3 and I dont know if its running or not, I cant get the driver test to run, and my machine acts funny with Mach3 running. Everything is slow, like screen refresh and mouse tracking. I boughtr this laptop specifically to run Mach2, but then figured I might as well get up to speed with Mach3 instead. I'm messing with it today, maybe I'll end up going back to Mach2, Imight even opt for a new (used) $100.00 desktop to run Mach3 on and nothing else.