http://blogs.technet.com/kevinremde/archive/2008/03/19/breaking-news-hyper-v-rc0-now-available.aspxThose of you tracking the progress with great enthusiasm (as I am) of the new Hyper-V virtualization in Windows Server 2008 will be excited to learn that we've just released Release Candidate 0 (RC0) of Hyper-V.&#160; Installation Instructions can been-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.technet.com/kevinremde/archive/2008/03/19/breaking-news-hyper-v-rc0-now-available.aspx#3019791Tue, 25 Mar 2008 02:00:04 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3019791Gerard Hebert<p>Is Hyper-V RC0 available for the version of Server 2008 we got at the Launch Event, or is it only available for 2008 Server RTM?</p> http://blogs.technet.com/kevinremde/archive/2008/03/19/breaking-news-hyper-v-rc0-now-available.aspx#3019838Tue, 25 Mar 2008 03:35:48 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3019838KevinRemde<p>Yes, and yes. &nbsp;:) &nbsp;The version you got at the Launch event IS RTM, and yes, Hyper-V RC0 is only for installation on RTM 64-bit installation of Windows Server 2008, and on a machine with both a CPU and BIOS that has and enables virtualization support.</p>