WINDOW 7 + The installer has encountered an unexpected error installing this package. Error code is 2869

I have faced this error while installing SubSonic( in my machine. I have searched on google and found the solution. This is a security issue with the Window 7.

To resolve this issue please open Command Prompt by right and ran as Administor. The move to the installer’s directory.  Then run following command on command prompt:


This will successfully install the installer. 🙂
Best Regards,


About Vijay Modi

Having 12+ years of experience in web application development. Expertise in various domains like E-Commerce, E-Learning, Insurance. I have expertise in web application development, window application development, Performance improvement, bug fixing etc. I have worked on various Microsoft technologies including ASP.Net, MVC, WebApi, WCF, Entity Framework, WPF, Window Application Development, AWS, Azure, AngularJS 2.0 / 1.5.2, .NetCore framework, jQuery. I am believing in quality work and achieving deadlines. Also like to work on new technologies and quick learner.
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3 Responses to WINDOW 7 + The installer has encountered an unexpected error installing this package. Error code is 2869

  1. RAHUL says:

    sorry to tell u Thing u have specified is not working in my case..

    in windows7 64bit platform.

  2. babak noori says:

    Server Error in ‘/’ Application.

    Runtime Error
    Description: An application error occurred on the server. The current custom error settings for this application prevent the details of the application error from being viewed remotely (for security reasons). It could, however, be viewed by browsers running on the local server machine.

    Details: To enable the details of this specific error message to be viewable on remote machines, please create a tag within a “web.config” configuration file located in the root directory of the current web application. This tag should then have its “mode” attribute set to “Off”.

    Notes: The current error page you are seeing can be replaced by a custom error page by modifying the “defaultRedirect” attribute of the application’s configuration tag to point to a custom error page URL.

  3. Vhutemas says:

    I have windows 7 64bits and works for me in ../program files (x86)/ folder

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