Hi,
I'm just guessing here but XP, depending on which service packs are installed may not have the later .NET components
required and regarded as standard environmental components for the Mach4 plugin 'M4DSPMC.m4pw'.
Is there a particular reason that you wish to use XP....it is getting pretty old school now.
Have you considered a PC such as this:
https://www.dfrobot.com/product-1585.html4 G RAM and 64 G eMMC with Windows 10 (Enterprise) and an Arduino co-processor all for $209.
Sure the eMMC is not quite a sprightly as a genuine SSD, but given that even a large Gcode file is less that 10MB
who cares? Windows Enterprise is a step up from Windows 10 Home. You can't turn off automatic Microsoft updates
with Home but you can with Enterprise......and you don't want an update when cutting a part because the PC will drop
Mach like a hot potato do the update and wreck your job.
I run Mach4 on a Dual core Atom running at 1.8GHz with onchip graphics and 4 GB DDR3 RAM with
Windows 7 Embedded (Standard) and it goes great. The Latte Panda is a little slower at 1.44GHz but quad core.
I think it will do a great job on Mach4.
At $209 for the hardware and Windows 10 (Ent) activation why would you bother with XP?
Craig