4.0: Download Microsoft Jet Oledb

Microsoft provides the "Microsoft Access Database Engine 2010 Redistributable" (and a 2016 version) for free. This engine allows you to open older .mdb files without needing the retired Jet engine.

Download Link:

If you absolutely must use Microsoft.Jet.OLEDB.4.0 (for legacy software that cannot be rewritten), here is how to enable it on modern Windows 10/11. download microsoft jet oledb 4.0

Instead of hunting for Jet 4.0, use Microsoft’s official successors: Good news: The driver is already installed

| Provider | Supports | Download | Architecture | |--------------|--------------|----------------|--------------------| | Microsoft Access Database Engine 2016 Redistributable | .ACCDB, .MDB, Excel .XLS/.XLSX, CSV, etc. | Microsoft Download Center | 32-bit & 64-bit (choose carefully) | | Microsoft ACE OLEDB 12.0 or 16.0 | Same as above | Same as above | 32/64-bit | | .NET Data Providers (OleDb in .NET) | Uses ACE if installed | Part of .NET Framework | Any CPU | Persist Security Info=False

Installing Microsoft Office 2003, 2007, or a 32-bit version of Office 2010 will also register the Jet 4.0 provider on your system. However, this is overkill for most development needs.

Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\path\to\database.mdb;Persist Security Info=False;

Good news: The driver is already installed. You don't need to download anything.