binkw32.dll is component for the BINK video codec and is used to play compressed movies within application such as games.
Binkw32.dll is a Microsoft Windows system file that helps many different programs run on the operating system. However, like most other files, it can become damaged or corrupt, which will have a domino effect and create issues for other applications.
Because of this, it is a good idea to fix the file as quickly as possible. The best way, and probably the quickest, is to replace the actual binkw32.dll file.