Download Microsoft Jet Oledb 4.0 ✦ Trusted & Popular

If a vendor or legacy application demands Jet 4.0, it is time to have a serious conversation about upgrading or virtualizing an old Windows XP machine. Do not expose that driver to the open internet or critical production data.

Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Data\Northwind.mdb;Persist Security Info=False; If you have Microsoft Office (any version) installed, the bitness of the Office installation must match the bitness of the Access Database Engine. You cannot install 64-bit ACE drivers if you have 32-bit Office (and vice versa). You may need to use the /quiet installer switch with the ACEOLEDB.DLL to force side-by-side, but that is an advanced scenario. Part 5: Step-by-Step – Switching from Jet 4.0 to ACE (The Right Way) Let us say your legacy VB script has:

Head to the official Microsoft Download Center and search for “Access Database Engine 2016 Redistributable.” Your future self will thank you. Last updated: October 2025. This guide adheres to Microsoft’s current lifecycle policies. Always verify bitness compatibility before installing data access components.