By default, the free-as-in-beer Microsoft Hyper-V Server 2008 is configured for manual updates. In other words, it is NOT configured out of the box to go fetch automatic updates. This is desired behavior for most installs. However, if there are critical
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Read the complete post at http://blogs.technet.com/tonyso/archive/2008/10/24/hyper-v-how-to-manually-patch-microsoft-hyper-v-server-2008.aspx