I would not trust any lap top with running a machine. The problem comes in the use of the power saving features some of which are not user adjustable via the OS. You also need to consider the impact of other programs that might be running in background mode or can self activate. Virus checkers and internet connections are potential problems that can cause problems with applications that need to run in real time and are intolerant of delays.
Suggest you buy a cheap mini desktop machine and run it as a stand alone. With multiple machines I use KVM box to switch the display to the machine as needed.
There are long lists of the lap-top functions that need to be inhibited and you would need to search on the support sites for help or form somebody running the exact combination you are proposing (Computer - software - CNC machine requirements).
Regards - Pat