I too am new to this forum. I run Mach3 on a Core 2 CPU with 3.25 GB ram. I am using only the X and Z axis and have a strange problem that I will attempt to explain.
At the end of the run, sometimes I shut down the program and control box, sometimes I leave the program and computer up and the control box off. Either way, when I return to Mach3, my coordinates are all messed up (can't find home or home has changed), or my profile has been corrupted, or both.
Has anyone seen anything similar to this? I would welcome any suggestions !