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IIS error: The page you are requesting cannot be served because of the extension configuration. | CodeAsp.Net

IIS error: The page you are requesting cannot be served because of the extension configuration.

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If you have installed ASP.NET 4.0 runtime on your system before installing IIS, you may run into this error while trying to run your ASP.NET web projects locally configured in IIS:

HTTP Error 404.3 - Not Found

The page you are requesting cannot be served because of the extension configuration. If the page is a script, add a handler. If the file should be downloaded, add a MIME map.

To fix this error, you can simply register ASP.NET 4.0 runtime with IIS using these steps:

1. Open VS 2010/2008 (if you are using ASP.NET 3.5) command prompt.

2. Type in this command: aspnet_regiis.exe  -i

3. After the command has finished running, you will get a message saying: Finished installing ASP.NET (version).

Your site should work now.

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