HTTP Error 404.3 WCF

When you browse WCF service file (with extension svc) in Visual Studio 2008/2010 or from Internet Information Services (IIS) Manager you might hit an http error 404.3. The error message is completely meaningless.

Luckily I managed to search David Waddleton’s blog to solve the issue.

The error is mainly caused by the .Net Framework 3.0 Features in Vista and .Net Framework 3.5.1 Features in Windows 7.

The following command in %Windows%Microsoft.NetFrameworkv3.0Windows Communication Foundation should be able to solve the 404.3 error.

ServiceModelReg -i

Do feedback to me if it does not solve the problem.


About chanmingman

Since March 2011 Microsoft Live Spaces migrated to Wordpress ( till now, I have is over 1 million viewers. This blog is about more than 50% telling you how to resolve error messages, especial for Microsoft products. The blog also has a lot of guidance teaching you how to get stated certain Microsoft technologies. The blog also uses as a help to keep my memory. The blog is never meant to give people consulting services or silver bullet solutions. It is a contribution to the community. Thanks for your support over the years. Ming Man is Microsoft MVP since year 2006. He is a software development manager for a multinational company. With 25 years of experience in the IT field, he has developed system using Clipper, COBOL, VB5, VB6, VB.NET, Java and C #. He has been using Visual Studio (.NET) since the Beta back in year 2000. He and the team have developed many projects using .NET platform such as SCM, and HR based applications. He is familiar with the N-Tier design of business application and is also an expert with database experience in MS SQL, Oracle and AS 400.
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