[better] Download Microsoft Jet Oledb 4.0 →

Because Jet 4.0 only exists as a 32-bit component, a 64-bit application cannot load it. If a 64-bit program tries to call Jet 4.0, Windows throws the "not registered" error. How to Fix the Error Without Downloading Anything Fix 1: Change Target CPU to x86 (For Developers) If you are compiling an application in Visual Studio: Open your project in Visual Studio. Go to > Compile (or Build ). Find the Target CPU or Platform target dropdown. Change it from Any CPU or x64 to x86 . Recompile and run your application.

To use ACE, you should download the (which provides the 12.0 provider) or its newer equivalents. This is the genuine Microsoft download that resolves the "provider not registered" error for legacy applications. This package, available in both 32-bit and 64-bit versions, finally provides the native 64-bit database engine that developers have been searching for.

For modern applications, particularly those requiring 64-bit support or compatibility with newer Office file formats ( .accdb ), Microsoft has superseded Jet with the . download microsoft jet oledb 4.0

Are you using 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

Ensure the Windows user account running the application has read/write permissions only to the folder containing the .mdb or .xls file, rather than broad administrative access. Because Jet 4

Choose the version that matches your application's architecture: Select AccessDatabaseEngine.exe for the 32-bit version. Select AccessDatabaseEngine_X64.exe for the 64-bit version. Run the installer and follow the on-screen prompts.

For a long-term, reliable solution, Microsoft recommends moving away from the deprecated Jet engine entirely. The official successor is the (also known as the ACE provider). This technology was first introduced with Office 2007 and has seen several updates since. Go to > Compile (or Build )

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

(Note: HDR=YES indicates that the first row of your Excel sheet contains column headings). Final Checklist

Microsoft never manufactured a 64-bit version of the Jet 4.0 provider.

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