Office 2007 Installer - The windows installer service cannot update one or more protected windows files.

FIX: Office 2007 Installer - The windows installer service cannot update one or more protected windows files.

I came across an interesting dilema just now trying to install Office 2007.

Before actually starting to install the product the setup stalled with:

The windows installer service cannot update one or more protected windows files.

I was a little stunned, this is clean installed box. So I checked the Event Viewer:

Product: Microsoft Software Update for Web Folders  (English) 12 -- Error 1933.

The Windows Installer service cannot update one or more protected Windows files. SFP Error: -536870654.

List of protected files:\r\nc:\program files\common files\microsoft shared\web server extensions\40\bin\fp4autl.dll

Ah ok, this is a customised installation of windows (I'll post how this happend later) and its looking for the frontpage extensions which (in this install) doesnt exist. So how to fix? Simple, download a copy of the missing file from DllDump, place it into the c:\program files\common files\microsoft shared\web server extensions\40\bin\ folder and retry installation!