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In case the restart is delayed, the installation of MSI packages may face an obstacle, leading to installation failure. This piece aims to assist in resolving the 0x80070BC9 error that arises when installing an MSI package while setting up Windows or installing a hotfix. Additionally, it covers the fundamentals of debugging and options available for providing feedback in Visual Studio.


May not be a solution or I might be missing something, but here is my 1 cent.

Try setting the mime types on IIS.

The error says 404 Not Found. So IIS as such is not able to locate your XBAP. Trying using Publish wizard in VS or an installer to deploy the app.

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