http://msmvps.com/blogs/bradley/archive/2008/12/04/hotfixes-for-hyper-v.aspxJose Barreto&#39;s Blog : Apply these Windows Server 2008 hotfixes to avoid known Hyper-V issues: http://blogs.technet.com/josebda/archive/2008/12/04/apply-these-windows-server-2008-hotfixes-to-avoid-known-hyper-v-issues.aspx The SBSized version of Jose&#39;senCommunityServer 2008.5 SP2 (Build: 40407.4157)http://msmvps.com/blogs/bradley/archive/2008/12/04/hotfixes-for-hyper-v.aspx#1655903Fri, 05 Dec 2008 16:38:19 GMTd67277c4-116b-43f1-b688-e9ef184ea916:1655903Joe_Raby<p>While those GUID issues crop up if you install SBS on a GPT disk in a UEFI-equipped system?</p> <p>Something to be aware of in the next couple of years anyway. &nbsp;I haven&#39;t seen too many servers that have UEFI support yet. &nbsp;Some have EFI 1.1 (not the same), for whatever reason, but it&#39;s not supported by Vista SP1/Server 2008 - only UEFI (EFI 2.0) is. &nbsp;Most systems don&#39;t fully support it properly though, at least on the desktop motherboards I&#39;ve tried. &nbsp;They often have major performance issues, or are lacking hardware drivers in the EFI firmware for things like AHCI or RAID mode, making it completely unusable. &nbsp;I&#39;d like to use it, but it&#39;s not what I would call a stable standard right now.</p> <div style="clear:both;"></div><img src="http://msmvps.com/aggbug.aspx?PostID=1655903" width="1" height="1">