Download Microsoft.ace.oledb.12.0 Provider For Both 64-bit -
By design, Microsoft prevents side-by-side installation of both bit versions of the Access Database Engine. The installer checks for existing Office components and blocks installation.
Before downloading, it is crucial to understand what this provider does. download microsoft.ace.oledb.12.0 provider for both 64-bit
Note: Both files are listed on the same Microsoft download page. Look for the "Choose your download" section and select the appropriate version. Note: Both files are listed on the same
Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\MyFolder\MyOldWorkbook.xls;Extended Properties="Excel 8.0;HDR=YES";
To get the provider for 64-bit systems, you need the Microsoft Access Database Engine 2010 Redistributable. Provider=Microsoft
Direct Download Link: Microsoft Access Database Engine 2010 Redistributable
| Error Message | Likely Cause | Solution |
|---------------|--------------|----------|
| "Provider not registered" | Bitness mismatch or not installed | Install correct bit version. |
| "Cannot update. A newer version is already installed" | Office 365 or newer ACE engine present | Uninstall newer engine first or use /passive. |
| "Microsoft.ACE.OLEDB.12.0 is not recognized" | Missing redistributable | Download and install from official link. |
| "External table is not in the expected format" | File corruption or Excel version mismatch | Save file as .xlsx or repair file. |
| " cannot start your application. The workgroup information file is missing" | Access security issue | Ensure .mdw file path is correct in connection string. |
If you absolutely need both providers on the same machine (e.g., supporting legacy and modern apps), use the /passive switch:




















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