Office 2010 Installation Error: The language of this installation package is not supported by your system.

Yesterday saw the release to TechNet and MSDN – Office 2010 Professional Plus.

After downloading the 650MB file, I attempted to install Office 2010 in a way I have done many times before.

I right clicked the file (en_office_professional_plus_2010_x86_515486.exe) and extracted the contents to a folder and ran Setup.exe and it failed with this error message.  “The language of this installation package is not supported by your system.”

After several WTF’s and then some more, I tried a different approach – I installed directly from the downloaded file – by double clicking  en_office_professional_plus_2010_x86_515486.exe and this time it installed correctly.

So is this expected behaviour or is there something odd about my setup?


All settings are English and UK.
Clean Windows 7 Ultimate 64bit.
Both Office 2010 64bit beta’s at some point had been on the PC but were cleanly removed.


The reason I was getting this error was due to the method I had used  in extracting the data from the file en_office_professional_plus_2010_x86_515486.exe

I had used Winzip, by right clicking the file and selecting Extract to D:\Office

The correct way for extacting the data was to extract using the command line. The syntax being

D:\en_office_professional_plus_2010_x86_515486.exe /extract:D:\Office

The switch /extract:D:\Office extracts the files contents to D:\Office on my PC, but could be any location.

The other interesting this was that when extracted with WinZip the contects looked like this when extracted

and like this with the native toolset.