Could not load file or assembly 'Microsoft.SqlServer.Sqm, Version=10.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91' or one of its dependencies. (SqlMgmt)

Trying to attach a database .MDF file via a newly installed SSMS (SQL Server Management Studio) and you get this dialog?

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

This FIX worked for  me:

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

Found here: Just a Reminder