Office 2007 Installation Error : The windows installer service cannot update one or more protected windows files and office 2007 rolled back.

While installing OFFICE 2007 sometimes installer fails to install office and gives an error.

ERROR--
The windows installer service cannot update one or more protected windows files and office 2007 rolled back.

This is a common error while installing Office 2007 on WinXP SP3.

Fix for the problem as follows :

1. Insert Windows installer disk. Find folder i386 in it.

2. Open folder i386 and find FP40EXT.CAB file.

3.Extract FP40EXT.CAB and find fp4ault.dll in the list.

4. Copy fp4ault.dll to the location  

    c:\program files\common files\microsoft shared\web server extensions\40\bin


5. Restart the 2007 office installation.

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