I have tried another keyboard, and the original keyboard on another computer. Does not seem keyboard related.
For some reason the Office applications seems to think that [Ctrl]+[Left arrow] = [Ctrl]+[C]
This is the command that is not working:
If I press Ctrl+right (as an example) it detects the keys
But if I press [Ctrl]+[left arrow] it thinks I am pressing [Ctrl]+[C]
Whatever I type in the box on the right is detected correctly except [Ctrl]+[Left Arrow]