Home > new vegas error code 80

How To Fix New Vegas Error Code 80?

Alton Alexander
By Alton AlexanderUpdated on June 3rd, 2022

New Vegas Error Code 80 is a problem that can occur when trying to launch the game. This error is caused by a file being missing or corrupt.

Other common searches for this error include:

  • new vegas failed to start error code 80
  • new vegas error code 80

1. Try running the game as an administrator

  1. Open the Start Menu and type "cmd" into the search bar.
  2. When the Command Prompt window appears, type in "net stop vegas" and press Enter.
  3. Next, type in "net start vegas" and press Enter.
  4. Finally, type in "regedit" and press Enter.
  5. In the Registry Editor window, navigate to the following key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
  6. In the Winlogon subkey, find the "Userinit" string value and delete it.
  7. Close the Registry Editor window.
  8. Restart the computer.

2. Verify the game files through Steam

  1. Launch Steam and sign in.
  2. In the top left corner of the Steam window, click the Games tab.
  3. Under the list of games, click the Verify Files button.
  4. In the dialog that appears, make sure that the game files are properly installed and are up to date.
  5. If the game files are not up to date, click the Install Update button.
  6. After the update is installed, click the Verify Files button.
  7. In the dialog that appears, make sure that the game files are properly installed and are up to date.
  8. If the game files are not up to date, click the Install Update button.
  9. After the update is installed, click the Play button to launch the game.

3. Delete the FalloutPrefs.ini file and let the game regenerate it

  1. Open the FalloutPrefs.ini file in a text editor.
  2. Find the line that reads "bInvalidateOlderFiles=" and delete it.
  3. Save the file.
  4. Launch the game and allow it to regenerate the preferences.

If you didn't find success with an option above, then try:

  1. Edit the FalloutPrefs.ini file and change the bInvalidateOlderFiles setting to 0.
  2. Use the 4gb Fallout New Vegas Mod.
  3. Try running the game in compatibility mode for Windows XP.
  4. Try running the game in compatibility mode for Windows 7.
  5. Try running the game in compatibility mode for Windows 8.
  6. Try running the game in compatibility mode for Windows 10.
  7. Try running the game on a different computer.