Microsoft Jet 4.0 Service Pack 8 (SP8) provides the latest updates to the Jet 4.0 database engine with Windows XP, and is discussed in Microsoft Knowledge Base Article KB829558. Download now to get the most current updates for Jet 4.0. After you install this item, you may have to restart your computer.

You can download Jet 4.0 Service Pack 8 (SP8) for Windows 95/98/NT 4.0 from here