Apply these Windows Server 2008 hotfixes to avoid known Hyper-V issues
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.
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IMPORTANT UPDATE:
After the publication of this blog post, a new official source for the list of Hyper-V updates became available.
Please refer to https://technet.microsoft.com/en-us/library/dd430893.aspx as your comprehensive list of Hyper-V updates.