If you are building a Windows Server 2008 Hyper-V server from scratch, you will need a few updates to get the latest fixes in your server.
One of these is the KB950050 update, which brings the Hyper-V code from the beta version to the released (RTM) version.
That Hyper-V RTM update is on Windows Update already, so you will certainly get it as soon as you get your server updated (which you always should).
However, there are a few updates that won’t come down that way, since they apply only to specific scenarios. Here is a list of Hyper-V updates:
|Article Number||Description||Date Released||When it’s needed|
|950050||Hyper-V RTM||26-Jun-2008||Always, also in Windows Updates|
|950182||Resolve issue with Hyper-V virtual machine running x86 version of Windows using fewer processors than expected if the number of cores on a socket is not a power of 2||11-Apr-2008||If Windows x86-based VM used with a 6-core processor, apply to child|
|951308||Increased functionality and virtual machine control in the Windows Server 2008 Failover Cluster Management console for the Hyper-V role||11-Sep-2008||If Failover Clustering is used|
|951636||Hyper-V Language Pack Update for Windows Server 2008||11-Sep-2008||If using the additional languages offered|
|952627||Remote management of Windows Server 2008 Hyper-V||11-Sep-2008||If managing Hyper-V remotely, apply to remote|
|953585||Resolve issue when you try to start a Hyper-V virtual machine on a Windows Server 2008 computer that uses the NUMA architecture||04-Sep-2008||If NUMA hosts are used|
|953828||Resolve issue with NLB host not working as expected on virtual machines||25-Jun-2008||If NLB is used, apply to child|
|956589||Resolve potential issues when you manage Hyper-V with SCVMM||23-Sep-2008||If SCVMM is used|
|956697||Resolve issue in which the Hyper-V Volume Shadow Copy Service (VSS) does not back up virtual machines properly||08-Sep-2008||If VSS is used for backups|
|956710||Increased number of logical processors to 24 and virtual machines to 192||23-Sep-2008||If more than 16 logical processors are used|
|956774||Resolve the scenario where a BITS client cannot handle files that have paths that contain the volume GUID in Windows Server 2008||23-Sep-2008||If volume GUIDs are used|
|957967||Resolve issue with Hyper-V memory management||08-Oct-2008||If issue described surfaces|
|958065||Resolve issue with Hyper-V and Failover Clustering combined with a storage device managed by a third-party clustered file system or a third-party replication solution||03-Nov-2008||If third-party clustered file system or third-party replication solution used|
|958184||Resolve issue with virtual machine backup operations failing in Windows Server 2008 when Hyper-V virtual machine files are saved on a volume that is mounted on a failover cluster by using a volume GUID||05-Nov-2008||If backing up a volume mounted using a volume GUID|
Implement these updates if they apply to your specific scenario. This will help avoid some known issues and save you a support call. Be sure to read the entire KB article and follow all the instructions provided there.
After the publication of this blog post, a new official source for the list of Hyper-V updates became available.
Please refer to http://technet.microsoft.com/en-us/library/dd430893.aspx as your comprehensive list of Hyper-V updates.