I brought the 6040 version of what you are looking at a couple of years ago and only now sorted all the gremlins from that experience to be able to get mine to work.

To connect with Windows 10 you can buy a controller (UC100, UC300 or UC400) I went for the UC400 as replaced the parallel port connection with an ethernet connection which then made it compatible but as mentioned earlier the components were trash I ended up replacing every interior component which added to an easy £500 to the price bracket.

to give you an idea this was what was inside the control box:Click image for larger version.  Name: cnc interior[1].jpg  Views: 306  Size: 357.8 KB  ID: 26344