I uninstalled and reinstalled New Vegas to have a clean game and downloaded the new installed and ran it.
I keep getting press any key prompts from the installer and at the end of it my game refuses to load the menus and this is the second time its done this. Its done it before on the v2.4 installer.
I am using Windows 8.1 and i get to see the command prompt windows scrolling through line after line of files. I also have a Windows 7 machine and done the same and the command prompts are always blank but the v2.4 installer worked on Windows 7 but the same one didn't on Windows 8.1. I haven't had the chance to install the new version yet on my Windows 7 machine as its been interrupted twice and takes AGES. I won't be able to tell you if the game will work on Windows 7 until the weekend but the installation process is different on both machines. I think on Windows 8.1 there is something that isn't letting it work correctly.