1) Most classic theories on nuclear war include a nuclear winter after the attack, where particulates in the atmosphere cause a substantial drop in temperature,along with snowing, freezing and the like. There is a 'Great Winter' listed in the Fallout timeline, but it doesn't immediately follow...
According to some gamers, the default Direct X 12 in Windows 10 and 11 is having some issues with the Fallout 4 engine, and thus with the no sound problem in the game. For them, simply installing the old DirectX 10 helps to fix it. To see if this also works for you, you can down...