To re-install the Jet Database Engine:

If you are using Windows XP

1. Download the installer for the Jet Database Engine
2. Unzip the installer, and run it.
3. Restart the computer if necessary.

If you are using Windows Vista, 7, 8 or 10

The Jet Database Engine is included in these versions of Windows and automatically kept up to date, and it cannot be removed. However, it is possible for over-zealous uninstallers to unregister some of the files required for the Engine to work.

This file can be run to automatically find and register all the files required for the Engine to run in Windows Vista, 7, 8 or 10.