Start Fallout 4 OS win x 32 bit.
The starting version of Fallout 4 will not run on operating systems such as in the game are limited to checking the computer before running, but this can be changed to patch the game.
By steam requirements for iron, it is clear that the game requires at least 4GB of RAM to run and play but get to 2GB.
To remove these restrictions, fans did fix that removes them and the game works fine on win x32 bit, even works on 2 GB of RAM, but downloads very long.
Download: Fallout 4 for win x32 v.1.0
Setting: Set indicating the folder Fallout 4