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How to fix a "X3DAudio1_7.dll is missing" error

Kumar Kamal Kant asked on
i am using windows 7 64 bit. When i try to install a game tropico 5  the program can't start and an error message comes that the program can't start because x3DAudio1_7.dll is missing from your computer. Try reinstalling the program to fix this problem. But i had done the procedure several time still problem remain. What to do to fix the problem.
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BossDweeb replied on

See if updating Direct X helps -

 [ EDIT: Updated link 25 June '16 ]

Download DirectX End-User Runtime Web Installer from Official Microsoft Download Center

If you get a message that your Direct X is up to date the problem may be due to a corrupt DX file.

You could locate the  x3DAudio1_7.dll  file  in System32 and delete that file. 

Run the Web Installer  again to replace it.

Or - Reinstall Direct X using the full Direct X installer package.  This will overwrite all DirectX files.  -

Download Details - Microsoft Download Center - DirectX Redist (June 2010)

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