Will work mach3 under windows 10 if i update from windows 7 ?

The parallel port driver won't work. If you're using a motion controller, than it should work fine.

Is there going to be a fix for the parallel port so Mach can run on Windows 10?

Is there going to be a fix for the parallel port so Mach can run on Windows 10?

Unfortunately not - Win 10 will require an external motion controller for Mach3 operation.

Tweakie.

what if its 32bit version of windows 10?

No. If you want to use the parallel port, you need to use a 32 bit version of Windows 7 or older.

so the only way to get mach 3 to work with windows 10 is through a break out board or something similar?  I've been scouring the internet for the last 2 days looking for a definitive answer to this.
I was told that set up with a PCI slot parallel port card and 32 bit OS it should be good to go. 

Who told you that?
Mach3's parallel port driver will only work in Windows 7 and older, and is 32 bit only.

For Windows 10, you need a motion controller, not a breakout board.

Thanks

It was passed along to me from "mach 3 tech support"... so 2nd hand info

Why don't they compile the driver for 64bit?