The official clean version downloaded from the official website or on Steam and similar sites will work most stable. Sometimes the wisest thing is to download a clean Fallout 3, and only then independently all the desired modifications, along the way checking the operation of the game. If you are just starting the game by installing an unfamiliar assembly from the Internet (especially if it is not 'clean', that is, it has unofficial additions), and it already starts to freeze, crash, and so on, then the easiest way is to find another client. There can be a huge variety of reasons for that, and therefore the ways of solving the problem for each situation will be different. Despite the fact that Fallout 3 came out a long time ago, received a lot of DLC and updates, patches and hotfixes, the game sometimes continues to freeze both on weak computers and on powerful devices.
