Jet35sp3.exe (Microsoft Jet 3.5 Service Pack 3) replaces Jet35sp2.exe (Microsoft Jet 3.5 Service Pack 2), which is referenced on the Microsoft Office 97 SR-2 pages on Tools on the Web. Service Pack 2 and Service Pack 3 are both Year 2000-compliant; however, Service Pack 3 also includes additional security updates that are not available in Service Pack 2.
If you have not yet installed Service Pack 2 or Service Pack 3, you should install Service Pack 3. The Jet35sp3.exe file contains an update of several .dll files that are included with Microsoft Access 97, Microsoft Office 97 Professional Edition, Microsoft Visual Basic version 5.0 or later, and other products that incorporate Jet 3.5x. Microsoft Jet database engine version 3.51 provides an improved Compact utility that combines Compact and Repair into a single process. This version is the first release on CNET Download.com.