Download [2021] Microsoft Jet Oledb 4.0 〈2026〉

: Microsoft never released a native 64-bit version of the Jet OLEDB 4.0 provider.

If a 64-bit application tries to call the Jet 4.0 provider, the system throws an error. The error typically reads: Because the 64-bit application cannot see the 32-bit registry entries, it assumes the provider is missing. How to Fix the Error Without Downloading

If you are a developer working with older Access databases ( .mdb ) or Excel files, you’ve likely run into the infamous error: "The 'Microsoft.Jet.OLEDB.4.0' provider is not registered on the local machine."

What or software are you using to connect to the database? Are you running on a 32-bit or 64-bit operating system? download microsoft jet oledb 4.0

Last updated: October 2025. This guide adheres to Microsoft’s current lifecycle policies. Always verify bitness compatibility before installing data access components.

If you encounter issues during installation or when using the driver, try:

If you are seeing an error that the provider is "not registered," it is almost always due to a . The Jet 4.0 provider was only ever released as a 32-bit component . Why the Error Happens : Microsoft never released a native 64-bit version

If you still need the actual Jet 4.0 redistributable for an air-gapped legacy system, search for on an archive site (but understand the security risks).

Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\db.mdb;

or for newer ACE 16.0:

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.

Microsoft has not released a 64-bit version of the Jet driver. It cannot be "downloaded" to act as a 64-bit engine.