I have a spare new ASUS H110M-D motherboard on-board parallel port.
So I put in Intel I5 7600CPU 3.5GHZ and 16GB RAM and loaded up Windows 7 32bits to test.
(I intend to dual boot Win7 32bits and win 10 64bits)

MACH 3 parallel port pulse NOW can run at 100K Hz with “excellent” results with almost NO NEED for any “XP type Optimization Procedures”.

Motherboard:
ASUS H110M-D which has parallel port, USB3, VGA & HDMI ports on motherboard.
CPU:
I5 7600 3.5MHz with Intel 630 Graphics on CPU
ASUS has 32bits  VIDEO driver for Windows 7 ONLY (but not 8.1 nor 10)
Memory:
16GB DDR4  (I intend to dual boot win 7 32bits and latest “troublesome” Win 10 64bits on this same PC
500GB old HDD to be converted to new 512 SSD later.
Hurdles to overcome:
1.All Microsoft  Windows 7 update had to be initially done manually 2 times BEFORE automatic updates will work
2. Annoying “unsupported hardware'' popups can be silenced by removing 4 Updates that are installed.
3. 2 registry entries must be added for MACH3 to work with all latest window 7 updates
(it is in Mach3 forum)

UNFORTUNATELY
Time is running out to get Windows 7 and Motherboard and CPUs that will support Win7.

(I intend to dual boot Win7 32bits and win 10 64bits)

By all means try but you will not be able to use the LPT Parallel Port on a 64 bit PC.

Mach3 runs VERY WELL on WIN7 32bits with Parallel port(s).

Since I only have old versions of CAD software, I could load them all in win7 32 bits now.

I have to dual boot into Win 10x64 ONLY in the times I have to buy/upgrade to new CAD software that no longer supports 32bits OS.
I know that I cannot run Mach3 with a parallel port on 64bit OS but I can always get a external motion controller later.

Some more TIPS: More hurdles to installing win7 on new motherboards

1. New motherboards from Intel Chipset H100  & above and Intel CPU from 7th Generations up are specially designed for Windows 10 x64 ONLY (Not even Windows 10 x86, windows 8.1 or Windows 7).
2. Only XHCI (eXtensible Host Controller Interface) for USB3 is supported from Chipset H100 up and because EHCI controller (USB2) is no longer supported, it would be very quite hard to install windows 7 UNLESS you start by using a PS2 keyboard and a DVDROM. USB keyboard and mouse will stop working during installation - in their effort to stop people installing Win 7 or 8.1.
But after installing with a PS2 keyboard, load the USB3 driver and Win 7 will then work normally supporting USB keyboard and mouse & other USB devices (like USB motion controllers)
(Intel, AMD and Microsoft etc.are trying to FORCE only Windows 10 64 bits on USERS).
3. So for the less brave, get a B85M chipset or older motherboard and Intel 6th Generation or older CPUs and installation of Windows 7 32bits will be EASY.