Mark B. – tech

The ‘Microsoft.Jet.OLEDB.4.0’ provider is not registered on the local machine

If encountered this error in your ASP.NET website , there’re several way to solve this issue.

  1. Please check if Office 2007/2010 Jet drivers already installed.
  2. If you’re still getting the same error like me, then you’ll have to allow the IIS application pool to run 32 bit applications :

    Navigate to Server Manager > Roles > Web Server (IIS) > Internet Information Services (IIS) Manager, then right-click on your website’s Application Pool and click “Advanced Settings”:

    Set the Enable  32-Bit Application to TRUE.
    This should enable IIS to run 32-Bit Applications in a default x64 environment, but I was getting another error:

    HTTP Error 404.2 – Not Found
    The page you are requesting cannot be served because of the ISAPI and CGI Restriction list settings on the Web server.

    After testing and digging a little deeper, I found two solutions :

    1/ Migrate the website from Classic mode to Integrated Pipeline mode, and IIS will be able to run 32-Bit Applications.

    If your website has httpmodules and httphandlers the manual migration process is not easy, so I advise you to update your Visual studio, recompile your website and publish it:

    Microsoft Visual Studio 2008 Shell (Integrated) Redistributable Package:
    Microsoft Visual Studio 2010 Shell (Integrated) Redistributable Package:

    2/ Activate the 32 bit .Net framework in the ISAPI and CGI restrictions list :

    – Navigate to Server Manager > Roles > Web Server (IIS) > Internet Information Services (IIS) Manager, click on the server name, open the “ISAPI and CGI Restrictions” window and allow access to the 32 bit .Net framework :

    that’s all, everything should be running just fine.

  3. Alternative solution, Migrate to a 64-bit compatible OLEDB Jet driver version :
    Here’s how to update to a new 64-bit compatible database engine:1/ Download the Microsoft Access Database Engine 2010 Redistributable, you can choose from the 32 bit or 64 bit version depending on your machine and install it on your server

    2/ in your application or website code, update the connection string from “Provider=Microsoft.Jet.OLEDB.4.0; “  to  “Provider=Microsoft.ACE.OLEDB.12.0;”

    3/ recompile and run your application

source :

This entry was published on March 30, 2012 at 3:51 am and is filed under IT Problem Solving. Bookmark the permalink. Follow any comments here with the RSS feed for this post.

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