IIS enable HTTP PUT and DELETE

most easy way

• https://stackoverflow.com/questions/12440277/how-do-i-enable-http-put-and-delete-for-asp-net-mvc-in-iis
  Go to Handler Mappings in your IIS Manager. Find ExtensionlessUrlHandler-Integrated-4.0, double click it. Click Request Restrictions... button and on Verbs tab, add both DELETE and PUT.
  
  GET,HEAD,POST,DEBUG,PUT,DELETE

EDIT: Possible WebDav Publisher issue

You've mention on a deleted post you were running on a 2008 server right? Try removing webDav role, or disable it from your site config: on system.webServer -> modules section, remove WebDAVModule module:

<system.webServer>
  <modules>
    <remove name="WebDAVModule" />
  </modules>
  <handlers>
    <remove name="WebDAV" />
  </handlers>
</system.webServer>