Rode no cmd (modo elevado se for windows server 2008) o comando abaixo:
C:\Program Files\Microsoft SQL Server\90\Shared>mofcomp "C:\Program Files\Microsoft SQL Server\90\Shared\sqlmgmproviderxpsp2up.mof
Troque de acordo com seus diretórios.
Fonte: http://social.msdn.microsoft.com/Forums/en-US/sqlkjmanageability/thread/e25e284b-6c95-4205-9714-4aa355edfa2a/
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