I had an issue with my keyboard not working in PinballX.
I could use ctrl alt del, the Windows key and alt tab though no input to PinballX.
OS Win 7 64 Bit
My Win 10 32 Bit with the same software installed I didn't have to perform these steps.
The good news is I found the problem.
Comodo Internet Security was blocking PinballX from capturing the inputs.
I hope this saves those with this issue the headache.
DUG
The screen shots below show the steps.