Launcher incorrectly claims that the game is already running

I turn on my computer, start the launcher and press to play the game, but doesn't work, I try again and the message "game already running" pops up with the options "quit" and "start anyway", but when i click start anyway the same problem of the beggining happens. I already tried to restart the game, my computer and uninstalled and reinstalled the game and that does not work. I already changed my password just in case i got hacked. Pls, i just want to play