Rutex relay board crashes system

Hi
I just developed a problem in that when I turn on my spindle through Mach2 it causes the computer to go to blue screen with the word" Problem with hardware call vendor" or something like that. It does it even with the VFD off. That’s what leads me to believe it’s the relay board. Is it possible that it’s the parallel port freaking out?

I know this is a tough one to advise on but I thought I’d throw it out there before I ordered another board.

Thanks
Derek