D3dx9_43.dll - library of functions, which is a necessary component for many games, as well as the operating system itself. The absence of this library often upset gamers who can not run their favorite game. Examples of messages that show that D3dx9_43.dll is missing can be seen in the screenshots.
However, although it is recommended to reinstall the program itself in the messages, this is not where we need to start. To restore the file we need, you can use two options to fix the problem. First and preferred: Reinstall DirectX. Second: Manually copy the file to the appropriate folder.
The first option is more reliable and, moreover, simpler. Install DirectX and the problem should be solved. If, for some reason, the problem has not been solved, you can try to restore the file manually. Keep in mind that DLL files can be infected with viruses, so we recommend you to download D3dx9_43.dll only from this page. The archive with the DLL file also has instructions on how to install it.
If none of the methods has helped, all the following steps should be performed one by one:
to scan the system for viruses. Besides your antivirus, try Dr.WEB CureIt! If the file is constantly disappearing, it may be the result of a virus. Then you need to reinstall DirectX;
Set available updates for Windows. The problem can be solved automatically;
try the 64-bit version of the game or program (if the system supports it) or, on the contrary, the 32-bit version;
For the record:
A DLL library is a file similar in structure to a program, but it never runs independently. It is used by other applications to access the functions it contains.