Virtual machines stop responding (hang) during startup and the Vmms.exe process crashes on a Windows Server 2008 R2 computer that has the Hyper-V role installed - Microsoft Support. Windows Server 2008 R2 Standard Windows Server 2008 R2 Enterprise More... Symptoms. Consider the following scenario:

The Hyper-V Virtual Machine Management service stops responding intermittently when the service is stopped in Windows Server 2008 R2 - Microsoft Support.

VMMS.exe process crashes after restart on a Windows 8.1 or Windows Server 2012 R2-based Hyper-V cluster - Microsoft Support. Windows 8.1 Enterprise Windows 8.1 Pro Windows 8.1 More... Symptoms. Consider the following scenario: You have a Windows Server 2012 R2-based Hyper-V cluster managed by System Center Virtual Machine Manager (SCVMM).

When a failover starts, the Vmms.exe process freezes on some of the failover cluster nodes. Therefore, several virtual machines are in the offline state. Cause. This issue occurs because of a mismatch of the access tokens. Resolution. Update information. To resolve this issue, install update rollup 2855336.

VMMS.exe process crashes after restart on a Windows 8.1 or Windows Server 2012 R2-based Hyper-V cluster - Microsoft Support. Windows 8.1 Enterprise Windows 8.1 Pro Windows 8.1 More... Symptoms. Consider the following scenario: You have a Windows Server 2012 R2-based Hyper-V cluster managed by System Center Virtual Machine Manager (SCVMM).

In this scenario, the Virtual Machine Management Service (Vmms.exe) on destination Hyper-V host crashes and the live migration fails. Resolution. To resolve this issue, install update rollup 2995388.

Hyper-V storage migration fails when you try to migrate virtual hard disk (VHD) and configuration files to Cluster Shared Volumes (CSV) volumes in Windows Server 2012 R2. When this issue occurs, you receive an error message that looks something like this: Migration did not succeed. Not enough disk space at '\'.

Fixes an issue in which you receive an error message when you try to migrate VHD and configuration files to CSV volumes in Windows Server 2012.

This issue occurs because the Hyper-V Virtual Machine Management service (VMMS) certificate has expired. Resolution Service Pack Information. To resolve this problem, obtain the latest service pack for Windows Server 2008. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

Status. Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. References. See the terminology that Microsoft uses to describe software updates. Fixes an issue in which virtual machine storage files cannot be removed from the source location in Windows 8.1 or Windows Server 2012 R2.