Hi
We had a problem with Hyper-V , SQL in Cluste
The best solution
http://vittoriop77.blogspot.com/2009/02/sql-2008-cluster-current-sku-is-invalid.html
The Microsoft Solution
http://support.microsoft.com/kb/955392
http://support.microsoft.com/kb/957459/
http://knol.google.com/k/leonid-shirmanov/sql-server-2008-cumulative-updates-and/2i969eujgjrbz/11#
Regards