Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\MyData.mdb; New (ACE 12.0 or 16.0): Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\MyData.mdb; or Provider=Microsoft.ACE.OLEDB.16.0;Data Source=C:\MyData.mdb;

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

2. The Modern Replacement: Microsoft Access Database Engine (ACE)

However, if you are missing data connectivity components for modern applications, Microsoft recommends downloading the as a modern replacement .

If you are maintaining an older software system, building legacy database tools, or troubleshooting an "OLEDB 4.0 provider is not registered" error, this guide will help you understand how to safely acquire and configure this component. What is Microsoft Jet OLEDB 4.0?

This is the most stable redistributable provider available for legacy app support.

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because Jet 4.0 was part of the Windows OS, not a redistributable package. It came pre-installed with Windows up to XP/Server 2003. On newer Windows, Jet 4.0 DLLs are missing or severely restricted.

Install the 64-bit version if your app is 64-bit, or 32-bit if your app is 32-bit. Update your connection string to use the new provider:

from Microsoft. It has been functionally deprecated since Windows 2000. Microsoft Community Hub The original Jet 4.0 provider is pre-installed

After this, the 64-bit provider will be visible in your OLEDB list.