My wife says that my CNC with Mach3 will not work on Christmas day !!! I don't know how she knows.
Having said that - you haven't really said a lot - what are you expecting. Have you got your motor attached to a driver card etc. Has this worked before
In other words what have you done.
New PC - download Mach3 - connect cable to printer port - (connect other end to a breakout board) - connect leads from pins 2 and 3 to step and direction pins on the driver card (and also a 0v return wire) - (if you have eight wire motors (four segments) then cross couple the wires to give four wires (two segments)) - connect driver card outputs to the four wires of the motor. Connect power supply to the card.
On the computer - mach3/ports and pins/port ********* selection - enable port 1
motor output - show port 1, pin 2 as the step for A axis, port 1 pin 2 as the dir for A axis
Make sure both are enabled in the first column, and you can tick active low on both pins (but you might have to reverse this)
Make sure there is no axis enable switch or pin on your driver card.
That should be it - away you go.
If you have done all that and it still doesn't work get back on the forum!!
Although how long I can stay on today is in the lap of the household authorities.