Thank you for working on this with me.

There will be a solution when there is a solution.

ok here is the dxdiag log
https://www.dropbox.com/s/0ko1iulttq2xg ... g.txt?dl=0

(It will not allow me to up load a .txt file.)

I still lose my mouse cursor in windowed mode.

I have done this, and made it 6 turns (No audio of course).
I went to make a purchase and the mouse cursor vanished again.

Are there log files you need to look at, or a debug mode to generate log files?

Yup, same issue with SteelSreries Sensai

Ok, I have tried this. Even with everything stripped down this is still happening.
I have uninstalled, rebooted, and re-installed just in case.

I have tried that.
It is still happening.

I have tried running without the mouse programming software running,
The problem still occurs.

My mouse is an eVGA Torq X10, with matching software for programming the mouse.

I have no other devices

I should add that I am running Window 7 Ultimate

I picked this game up today on steam and I am having an issue with the mouse disappearing in Tutorial campaign mission 1 turn 1. If I manage to save my game it disappears in turn two as well. I finish my moves, and then the mouse cursor vanishes, and I have have to quit by guessing where the cursor ...