Solved: Microsoft Office 2007 Protected Files Installation Error

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Today I came across an error whilst trying to install Microsoft Office 2007 on an XP machine with service pack 3. The error occured part way through the installation process and caused the installer to roll back and give the following message.

Microsoft Office 2007 encountered an error during setup. The Windows Installer service cannot update one or more protected Windows files.

Well that’s not very useful is it!  I did a bit of searching as you do when you have a problem and came across the solution. The problem, at least for me, was that the unnamed file was missing from my system. The file is fp4autl.dll and the steps I took to solve the problem were…

  1. From the i386 directory on the install disc find and open the file  FP40EXT.CAB
  2. Find the fp4autl.dll file
  3. Copy the file to C:\program files\common files\microsoft shared\web server extensions\40\bin\
  4. Restart the Office 2007 installation

That worked a charm and now I can use Office again 🙂

12 Responses to “Solved: Microsoft Office 2007 Protected Files Installation Error”

  1. Craig Loosenth Says:

    Dood! You rox! Saved my arse…had no clue as to what was going on. Thanks again bro!

  2. Alex Says:

    Thank you!! better than Microsoft support. It really works.

  3. amir Says:

    Works! great work!

  4. Richard Says:

    Thanks mate!

  5. Jirka Says:

    Wow! That works, but I really wonder how did you find it (And I also wonder how could Microsoft sell a product which cannot be installed without third party solution).

  6. Office 2007 installation rolling back due to protected files | 【Y】 Live Says:

    […] from […]

  7. xing gao Says:

    awesome, it works even on my problem of project 2010 and windows xp!!!

  8. matthew Says:

    you rock man totally worked. if it wasn’t for the internet and pages like this Id never get windows to do anything right

  9. Paul Says:

    Can you help me please?
    I don`t find the directory i386 and i have the enterprise pack. Thanks!

  10. real Says:

    .. wow .. nice info man .. work like charm 😀

  11. Nazir Says:

    Wow man,nice solution,works like a charm.Break my head for 2

  12. Dan D Says:

    I’ll be damned, that worked on an XP installed in VirtualBox.

    How the f*** did you figure out what file was missing? Did you run some sort of file open monitoring utility?

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