Side note
I disconnected my Corsair K70 and plugged in my old Microsoft Natural Ergonomic 4000 Keyboard. Worked well for about 1 hour but it eventually also stopped responding.
When I manually exited the game I could not type in my web browser or any other app. Made sure every steam process was closed in the Task Manager but it made no change. I had to reboot to get they keyboard working again.
