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Genial! agora ficou fácil pra administradores de sistema instalarem Silverlight em todas as máquinas de um ambiente:

I'm really glad this is now available: the need for administrator rights to install a web plug-in is not unique to Silverlight, of course, but it's been raised a number of times as a potential blocker to enterprise adoption. Having this available will solve that problem and make it far easier for enterprise administrators to control deployment of Silverlight to their users.

Tim Sneath : Making Silverlight Easier for Systems Administrators to Install...