Download Microsoft.ace.oledb.12.0 Provider For Both 64-bit ^hot^ -

To download the Microsoft.ACE.OLEDB.12.0 provider for a 64-bit environment, you need the Microsoft Access Database Engine 2010 Redistributable . While newer versions like the Microsoft Access Database Engine 2016

Run the installer that matches your primary application's bitness (e.g., if you use 64-bit SQL Server, install the 64-bit version first). Follow the on-screen prompts to complete the installation. download microsoft.ace.oledb.12.0 provider for both 64-bit

Error 1: "The provider is not registered" after installation

Cause: Your application’s architecture does not match the installed provider. Fix: To download the Microsoft

Official Download Links (2024 Update):

1. For 64-bit Systems (Most Common Today)

File Name: AccessDatabaseEngine_x64.exe
Direct Microsoft Link:
https://www.microsoft.com/en-us/download/details.aspx?id=54920
Version: 2016 Redistributable (still provides ACE.OLEDB.12.0, 14.0, and 16.0)

Alternative Command Line Sequence (For advanced users)

If /passive fails, try this on a clean machine (no Office): File Name: AccessDatabaseEngine_x64

For example, a 64-bit version of Windows can run a 32-bit Microsoft Excel. That 32-bit Excel requires the 32-bit ACE.OLEDB.12.0 provider.

Microsoft 365 Access Runtime: A modern alternative for users of Office 365, available at Microsoft Support . How to Install Both 64-bit and 32-bit Together

Part 7: Best Practices & Security Considerations

Avoid installing on Domain Controllers. The ACE engine uses temporary file creation which can conflict with DC security policies.
Set memory limits. The ACE provider can leak memory when used in loops. Always explicitly close connections and dispose of objects.
Use temporary folders with proper ACLs. The engine creates temporary files in %TEMP%. Ensure your service account has read/write access.
Consider moving away from ACE for new projects. While Microsoft.ACE.OLEDB.12.0 is stable, it is a legacy technology. For new development, consider using: