Language packs are installed on this server and must be upgraded with the Exchange binaries. Please specify a language bundle with the upgrade operation

I faced the below error while upgrading Exchange 2010 to SP1.

I did not face this error while updating Exchange 2007 but I have no explanation for that. after search I came out the following workaround

1. Download the language pack from the Microsoft website instead of using the one on the DVD:
   http://www.microsoft.com/downloads/en/details.aspx?FamilyID=56C2AF38-A080-4CE1-8518-E63EE87F11C5
2. Run Exchange 2010 setup again. Click Upgrade all languages from the language bundle
3. Set the path to the language bundle you downloaded from the Microsoft website
4. run the setup wizard again and it should pass this time

Regards,

Haytham