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Turn on V-sync in the launcher settings.If the game still crashes change to: iNumHWThreads=1 Multi-cores cause crashes in the Gamebyro Engine. This will prevent the game from using more than two cores.
Add another line after it and insert: iNumHWThreads=2. Open up the fallout.ini file in: Documents\My Games\Fallout New Vegas:. Uninstall the game>Run a Regcleaner>Reinstall. Select the game in steam and Start it from there. Afterwards, if you install the game through steam revalidate the game files. Run the game in compatibility mode for Windows XP SP3. Once the process is completed, the Check Window will automatically exit. Steam will verify the game cache files (GCF's) - this process may take several minutes. Select the Local files tab and click the Verify integrity of game cache. From the My Games tab right-click on the game and select Properties from the menu. An excellent method of doing this is a tool you can find here. Compare your system with the system requirements of Fallout: New Vegas.
Clean your registry and defrag your hard drive. Some steps to take before you attempt any fixes. I take no responsibility for any and all damages caused to you by attempting the methods in this guide. I highly recommend that you backup all files that you change during your troubleshooting. If you have any solutions or suggestions that aren't listed here than if you could kindly post in the comments box you, would be credited and I would be very grateful. This article is the first edition and as such, is probably missing many fixes. This article does not cover mod troubleshooting and it is recommended that, before you start to use any of the methods listed here, you disable all of your mods and create a new savegame. There are fixes however, and this guide will help you in getting the most out of your Fallout game. Since you're here, that probably means that you are the victim of one or more of these afflictions. While Fallout: New Vegas is an excellent game it is also right with bugs, glitches, and performance issues.