Like the title says, I finished the game in a 100 hours of play without a single crash, I turned off both updates and cloud support in Steam. Yesterday I started Steam to find that both cloud and update was turned back on and my game patched itself.
Now I'm having one crash after another. I'm happy you are trying to fix your game, but forcing an update on people who had no problems with the game and wanted it to stay that way is bogus. If I had wanted the patch I would have activated updates by myself.
I had them (updates and cloud support) turned off. After the patch came out, they had not been turned on, but the patch had been applied. That was before we knew there might be problems. I got a zone alarm message asking whether I approved of what falloutnv was doing, said yes, and then lost the game till I removed invalidated.