Problem starting Portal 2 (Portal 2)

Hello everyone, I had a problem launching Portal 2. I bought it about a year ago in the incentive. I played without problems, the whole game was over. Not so long ago I decided to call a friend to play multiplayer (I played before, but there were no problems). A few days later, we decided to continue playing, I started the game, but after loading it crashed without an error with the window "Portal2.exe finished". Since then, the game has not started. I scored on this, but recently a new addon came out in which I really want to play, but the problem still remained. Google doesn't say anything. The addon also does not start (crashes after loading). I set the game to XP compatibility and portal 2 started. After that I decided to put compatibility on the addon to the portal, but it still crashes. After each launch of the game, I checked the integrity of the cache.
The addon itself also crashes without errors and with the same window "Portal2.exe is completed". While trying to start the game, I got 97 minutes in the game, lol.
Can someone know the solution to the problem?