We do not provide that file with the game as it is not needed by the game. When you start replacing DLL's in Windows, you really need to have a good understanding of what is going to be impacted by that action.
If the game was crashing, on your computer, then there is usually something driver related causing it, not DLL related. Replacing a DLL might cause a service to have a problem, then it could impact the game if the Windows service being impacted is tied to anything the game needs from the operating system.
You need to get back to where you were (system restore is not going to fix this one, then we can start a logical search to find what the problem may be.