He tried clicking a few links promising direct downloads of the driver. Half of them redirected to dead Microsoft 404 pages from the mid-aughts. The other half looked like sketchy third-party driver sites that would gladly give him the file, provided he also wanted to install three different Russian browser toolbars. The realization

If you have installed, your system already has the 64-bit ACE drivers. However, if you are running a 32-bit application (like an old VB6 app or a 32-bit IIS Application Pool) and try to use the ACE driver, it will fail because it tries to load the 64-bit driver into a 32-bit process.