Editing HTTP 404 (section)

===Substatus codes===
Microsoft's IIS 7.0, IIS 7.5, and IIS 8.0 servers define the following HTTP substatus codes to indicate a more specific cause of a 404 error:

* 404.0 – Not found.
* 404.1 – Site Not Found.
* 404.2 – [[ISAPI]] or [[Common Gateway Interface|CGI]] restriction.
* 404.3 – [[MIME]] type restriction.
* 404.4 – No handler configured.
* 404.5 – Denied by request filtering configuration.
* 404.6 – Verb denied.
* 404.7 – File extension denied.
* 404.8 – Hidden namespace.
* 404.9 – File attribute hidden.
* 404.10 – Request header too long.
* 404.11 – Request contains double escape sequence.
* 404.12 – Request contains high-bit characters.
* 404.13 – Content length too large.
* 404.14 – Request URL too long.
* 404.15 – Query string too long.
* 404.16 – DAV request sent to the static file handler.
* 404.17 – Dynamic content mapped to the static file handler via a wildcard MIME mapping.
* 404.18 – Query string sequence denied.
* 404.19 – Denied by filtering rule.
* 404.20 – Too Many URL Segments.