The cursor and sound do not work

The mouse has not been working at 2000 Hz for five days. The sound in the headphones is working at 50% volume. What could be the problem? In season 29 there was a problem that the mouse did not work at 2000 Hz. The problem was solved by updating the game. And in season 30 how will the problem with the mouse and sound be solved? I have not been able to play for five days.