Yes, I'm running the game on Steam with my laptop. No external monitors connected.
Get the PC Trainer Customizer from here
www.cheathappens.com/trainer_troubleshooting.asp
Re-bind the keys to something else, as it may be looking for the Numpad keys which most laptops don't have.
Or if you have an USB numpad, plug it in and try that.
[Edited by CyPHeR369, 9/7/2020 9:15:51 PM]