I am trying to add some services (full-text search, integration services, etc.) in SQL Server 2008, which I did not install with the first SQL server installation, now that I have decided to add these functions to the sql server I 'get a message about error:
SQL Server Installer encountered the following error:
The value cannot be null. Parameter Name: doc.
I have Win 7 x64


I would appreciate any help.
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