Download Microsoft Jet Oledb 4.0 [portable] 🎯 Trusted

The Microsoft.Jet.OLEDB.4.0 provider is a legacy technology, native only to 32-bit Windows operating systems. It is primarily used to connect to older Access database formats (.mdb) and is not available in a 64-bit version. Understanding the Problem

The "Not Registered" Error: This frequently occurs on 64-bit Windows when running a 32-bit application designed for Jet.

No 64-bit Driver: Microsoft has not released a 64-bit version of the Jet driver. It cannot be "downloaded" to act as a 64-bit engine.

Replacement: The direct upgrade for Jet 4.0 is the Microsoft ACE OLEDB Provider (Access Database Engine). Recommended Solutions Switch to ACE OLEDB (Preferred Solution)

Download the Microsoft Access Database Engine 2010 Redistributable (provides 32-bit and 64-bit options).

Change your connection string from Provider=Microsoft.Jet.OLEDB.4.0 to:Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\yourdb.accdb;.

Note: Use the 64-bit driver if your application is compiled for 64-bit, or 32-bit if your app is 32-bit. Force Application to 32-bit (For Visual Studio/C#)

If you must use Microsoft.Jet.OLEDB.4.0 and cannot change the code: Go to Project Properties > Build. Set Platform Target to x86 (do not use "Any CPU"). download microsoft jet oledb 4.0

This forces the app to run in 32-bit mode using the 32-bit Jet driver available in Windows WOW64. Use Modern Alternatives

If you are creating new applications, use SQL Server Express Edition or SQL Server Compact Edition. Connection Strings

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

Modern (.accdb): Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\db.accdb;

To make sure I provide the exact right solution for you, could you please tell me: Are you working with a .mdb or .accdb file? Is your app/application 32-bit or 64-bit?

Are you using Visual Studio or another tool (like Excel/Office)? I can help guide you to the specific setup you need. Microsoft Jet 4.0 OLE DB Provider Windows 7 64Bit

The Microsoft Jet OLEDB 4.0 provider is a legacy database component used to connect applications to older Microsoft Access (.mdb) and Excel (.xls) files. You likely do not need to download it separately, as it has been a built-in component of the Windows operating system since Windows 2000. The Microsoft

If you are seeing an error that the "provider is not registered on the local machine," it is typically due to a bitness mismatch—the Jet engine is strictly 32-bit and cannot be called by 64-bit applications. Understanding the Microsoft Jet OLEDB 4.0 Provider

Microsoft Jet (Joint Engine Technology) 4.0 was designed as a general-purpose database engine for 32-bit environments.

Included in Windows: It is part of the Windows Data Access Components (WDAC) and comes pre-installed on most modern Windows systems.

32-Bit Only: There is no native 64-bit version of the Jet 4.0 driver.

Legacy Support: It primarily supports Access 2000–2003 formats (.mdb) and Excel 97–2003 formats (.xls). Why You Can't Find a "Download" Link

Because Jet 4.0 is a system component, Microsoft no longer provides a standalone "Jet 4.0" installer for modern OS versions like Windows 10 or 11. If your application requires it, you must ensure the application is running in 32-bit mode (x86) to "see" the driver already on your system. The Modern Solution: Microsoft Access Database Engine (ACE)

For 64-bit applications or newer file formats (like .accdb and .xlsx), Microsoft replaced Jet with the Access Connectivity Engine (ACE). If not found, Jet 4

Directly downloading the Microsoft Jet OLEDB 4.0 provider as a standalone component is no longer possible because it is deprecated and has been an integral part of Windows for years.

Instead of searching for a "Jet 4.0" download, modern systems require specific workarounds or the use of its successor, the Microsoft ACE OLEDB provider. Core Solutions for Jet 4.0 Connectivity

If you are seeing the error "Microsoft.Jet.OLEDB.4.0 provider is not registered," it is almost always because your application is running in 64-bit mode, but Jet 4.0 only exists as a 32-bit component. Microsoft.Jet.OLEDB.4.0 - SS&C Blue Prism Community

5. Common troubleshooting (if you think Jet 4.0 is installed)

Check if registered: Open Command Prompt (Admin) and run:

reg query "HKEY_CLASSES_ROOT\CLSID\DEe35070-506B-11CF-B1AA-00AA00B8DE95" /s

If not found, Jet 4.0 is missing.

32-bit vs 64-bit mismatch:
Jet 4.0 is 32-bit only. If your app is 64-bit and tries to use Jet 4.0 → error.
Solution: Recompile your app to 32-bit, or switch to ACE OLEDB (which supports both).

Install MDAC (does not include Jet):
Many old guides suggest MDAC 2.8. MDAC does not contain Jet OLEDB – only SQL Server, Oracle, etc.

Common Use Cases (Why you might be looking for it)

1. Legacy VB6 or VBA Applications: Old business-critical apps that use ADODB.Connection with Provider=Microsoft.Jet.OLEDB.4.0.
2. SQL Server Integration Services (SSIS): Importing data from old Excel or Access files.
3. Windows PowerShell Scripts: Using System.Data.OleDb to query .mdb files.
4. ASP.NET Web Applications (Legacy): Older web apps running in 32-bit mode.

6) Connection string for Jet 4.0 (32-bit)

• For legacy .mdb files in a 32-bit app: Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\path\file.mdb;User Id=admin;Password=;