After reinstalling Windows, the saving disappeared (Fallout 4)

Good day to all. I ran into such a problem: I installed the game, played it, then I had to take down Windows, I wanted to play the game and it wasn’t in the incentive (there is a shortcut but it needs to be installed again, but the game is on the 27G hard drive) what to do, how to return it to steam and did not overwrite tried to add as a third-party product, everything exactly requires overwriting, tried to install to download the game to the folder where the game is installed but gives an error (writes that the folder must be empty) (game license)