Description: 'Storage Virtualization Service Provider' driver required by the Virtual Machine Management service is not installed or is disabled. Check your settings or try reinstalling the Hyper-V role. Log Name: Microsoft-Windows-Hyper-V-Image-Management-Service-Admin. Source: Microsoft-Windows-Hyper-V-Image-Management-Service. Event ID: 15062.

Symptoms. Under high load with 16 or more processors and many I/O failures, Windows 8.1 or Windows Server 2012 R2 virtual machines crash, which is caused by Stop error in vhdmp.sys. Resolution. To resolve this issue, install update 2919355.

STOP: 0x00000001 ( parameter1, parameter2, parameter3, parameter4) This error occurs because of the double release of a push lock. Notes. This Stop error indicates an APC_INDEX_MISMATCH issue. The parameters in this Stop error message vary, depending on the configuration of the computer.

Symptoms. Under high load with 16 or more processors and many I/O failures, Windows 8.1 or Windows Server 2012 R2 virtual machines crash, which is caused by Stop error in vhdmp.sys. Resolution. To resolve this issue, install update 2919355.

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Resolution. To resolve this issue, install update 2955164. For more information about how to obtain update 2955164, click the following article number to view the article in the Microsoft Knowledge Base: 2955164 Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 update rollup: May 2014.

Symptoms. When you use shared virtual hard disk (.vhdx) files on a Windows Server 2012 R2 computer, Windows OS may experience memory leak. For every IO issued by svhdxflt, VHDMP believes that there is an Activity ID. VHDMP enables this Activity ID tracing which results in the unnecessary nonpaged pool memory usage.

Symptoms. When you try to back up a data deduplication-enabled volume or compact a large virtual hard disk (VHDx) in Windows 8 or Windows Server 2012, the computer crashes. Additionally, you receive a stop error that resembles the following: Stop 0x000000C2 ( Parameter1, Parameter2, Parameter3, Parameter4) Notes.

This issue occurs because the exclusive write lock for virtual hard disks (.vhd or .vhdx files) can't be obtained. Then, the VHD Miniport (VHDMP) driver indeed returns a STATUS_LOCK_NOT_GRANTED (C0000055) error. However, it's overridden by the STATUS_INVALID_DEVICE_STATE/ERROR_BAD_COMMAND error from another call to VHDMP. How to obtain this hotfix

Symptoms. When you run a Windows Server 2012 R2 virtual machine in Windows Azure, the event log may fill with many event ID 129 events. Event 129 is logged when I/O requests are dropped because of time-out issues.