Close and reopen the game program that generated the binkw32.dll error. Whatever game you're playing may be having a temporary problem that a restart might fix.
Reinstall the game. Since the binkw32.dll error involves a video codec that should have been included inside your game installation, reinstalling the entire game is likely to resolve the problem.
Note: Even if you're not asked to, be sure to restart your computer after the uninstall and before the reinstall. Restarting your computer at this point will ensure that any loaded files are cleared from memory and that the uninstallation is 100% complete.