Could not load file or assembly 'Microsoft.SqlServer.Sqm ...

When you try to run SQL 2008 Management Studio on Windows 2008 R2 x64 you receive this error:

Microsoft SQL Server Management Studio
Cannot show requested dialog.

Could not load file or assembly 'Microsoft.SqlServer.Sqm, Version=10.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91' or one of its dependencies. The module was expected to contain an assembly manifest. (SqlMgmt)

Solution:

Copy the file Microsoft.SqlServer.Sqm.dll located on
C:\Program Files\Microsoft SQL Server\100\Shared to folder
C:\Program Files\Microsoft SQL Server\100\Tools\Binn\VSShell\Common7\IDE and
C:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\VSShell\Common7\IDE.