While creating a SharePoint Subsite : Error: The trial period for this product has expired

The trial period for this product has expired.     at Microsoft.SharePoint.Publishing.CmsSecurityUtilities.EnsureEvaluationNotExpired()     at Microsoft.SharePoint.Publishing.PublishingFeatureHandler.FeatureActivated(SPFeatureReceiverProperties receiverProperties)     at Microsoft.SharePoint.SPFeature.DoActivationCallout(Boolean fActivate, Boolean fForce)

Solution:
 after SP2 instalation run windows update then run sharepoint configuration wizard to rebuild aplication.
(Or)
http://support.microsoft.com/default.aspx/kb/971620