Sorry, XP 64-bit was an albatross. Even regular XP ceased support FIVE YEARS AGO.
What drivers there are for your board, are listed here:
You should abandon this board and XP 64 (which was never supported). Get a new(er) board, and get Windows 10 64-bit, where you will have all the support in the world.
So, your cnc machine software provider wrote a 64-bit app specifically for xp 64? XP 32 bit will not suffice? The board only supported a max of 4GB anyway. The cnc provider never progressed past XP?
How long have you known of the demise of XP? Ten years or more? You have had more than enough time to make transition plans.
And, for this "mission critical" app and install, you did not have a backup or image of the system to restore?
Sorry, but I am unsympathetic regarding this, and the "my app only runs on xxx" excuses. I have heard them all.
By the way, that missing driver is not going to affect you.
Doc (not an intel employee or contractor)