Since i use Trackmania via Steam, i sometimes have the problem that my whole PC crashes when i try to start the game.
I launch the game and my mouse just freeze in place, looks like this typical hardware lag, where everything freezes for like half a seconds and then you can go on with whatever you did. But in this case, nothing helps except pressing the power button. No inputs are working, mouse freeze, keyboard does nothing, PC is just dead, even waiting for minutes does nothing.
I think that only happened after restarting the game. So closing and instantly starting the game might cause the bug, but i have no idea what it could be.