Random operation of the \"C\" key

People, hello!
The situation is extremely strange!
In games (and only in games), and not in all, the "C" key randomly works.
This causes a lot of inconvenience. Now I'm in a terrible situation. I play mafia remastered. Before that, everything was fine, but after he took the pipe, it's worth making a couple of shots and he switches to the pipe (the "C" key, her mother). And you can not reassign this key in the settings. And you can't throw out that fucking pipe.
Tried changing keyboard and mouse. Everything is the same. mother of asrock taichi x470.
Tell me where to look?