Windows Update Screwed me up once again - MOSS 2007 403 forbidden error

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I got a call from one of my customer last night that all the MOSS sites are throwing the 403 forbidden ('You are not authorised to view this page') errors including the Central Admin and "Yes" the windows automatic update screwed it all...Again.

The funny thing is if I browse mysite with "/default.aspx" included in the url, the site works

Have to do the following to get it fixed :

Open IIS Manager and go to Sites>Properties>Home Directory>Configuration, then in the Wildcard Application Maps box, add the aspnet_isapi.dll located in


C:\windows\microsoft.net\"framework" or "framework64"\v2.xxxxx

Ensure that the checkbox “Verify that the file exists” is UNchecked, otherwise error 404 page not found will be displayed. This is because the data is rendered from the SQL database and not from IIS locally, and SharePoint will process this on the run while the site is being accessed.

A nice reference here - http://etiennel.blogspot.com/2009/12/sharepoint-process-serving-application.html

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