Download and install June 2010 DirectX 9c End User Runtime.http://www.microsoft.com/download/en/details.aspx?id=8109
Thanks for the reply. Already tried that, and tried it again, but still no fix
EDIT: After installing it didnt work, I thought i'd try extracting the xinput1_3.dll file to my system32 folder. Now when i run FallousNV.exe I get "FalloutNV.exe - Application Error The application was unable to start correctly (0x000007b). Click OK to close the application." and the game won't launch. Any ideas on how to go about fixing this, now?