New Vegas Script Extender is needed for the below fixes to work. Listed below are the best and most used fixes for loads of issues, including: Hello! New Vegas is a great, but now pretty old game, that didn't run all that well when it came out, and is now only more crashy on modern systems. I’ll keep the below for posterity, or for anyone using older operating systems. I’d recommend using this guide instead to start off with: UPDATE 2021: This thread now has a lot of older, possibly broken fixes. Read this thread to solve the infinite loading screen/loading screen freeze bug!