| Aspect | Details | |--------|---------| | | ❌ Not officially available | | How to get it | Included in Windows (32-bit) + MDAC | | Supported OS | Windows 2000 up to Windows 10/11 (32-bit app only) | | Modern replacement | ACE OLEDB (Access Database Engine Redistributable) |
If you try to run an app using Jet 4.0 on a 64-bit server or computer, it usually crashes with the infamous error: "The 'Microsoft.Jet.OLEDB.4.0' provider is not registered on the local machine" .
For 90% of users who think they need Jet 4.0, they actually need the (or 2016). download microsoft jet oledb 4.0
is a legacy data provider that allows applications (like classic ASP, VB6, or Office-based tools) to connect to Microsoft Access databases (.mdb), Excel workbooks, text files, and other structured data sources via the Jet Database Engine.
The last official Jet 4.0 service pack was , released in the early 2000s. That SP8 update is the latest version of Jet OLEDB 4.0. | Aspect | Details | |--------|---------| | |
“The issue I described... occured basically due to the incompatibility of the Microsoft. Jet. OLEDB. 4.0 driver in 64 bit OS.” Stack Overflow · 16 years ago
string connString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\\data\\oldDB.mdb;"; // or for .accdb string connString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\\data\\newDB.accdb;"; The last official Jet 4
"The 'Microsoft.Jet.OLEDB.4.0' provider is not registered on the local machine."
Run this from an (32-bit mode):
For most users on modern operating systems, Jet 4.0 is actually still present, but it might be hidden or inaccessible due to architecture mismatches.