Un rollup para  Hyper-V (KB2264080) se ha publicado en Windows Update como una actualización opcional.

Este rollup incluye los fixes documentados en los siguientes KBs:

975530  Stop error message on a Windows Server 2008 R2-based computer that has the Hyper-V role installed and that uses one or more Intel CPUs that are code-named Nehalem: "0x00000101 - CLOCK_WATCHDOG_TIMEOUT"

http://support.microsoft.com/default.aspx?scid=kb;EN-US;975530

974909  The network connection of a running Hyper-V virtual machine is lost under heavy outgoing network traffic on a Windows Server 2008 R2-based computer

http://support.microsoft.com/default.aspx?scid=kb;EN-US;974909

981791  "STOP: 0x0000001a" error message on a computer that has an Intel Westmere processor together with the Hyper-V role installed on Windows Server 2008 SP2 or on Windows Server 2008 R2

http://support.microsoft.com/default.aspx?scid=kb;EN-US;981791

Aquí tenéis una captura del update en WU:

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Un saludo.

Raúl del Moral

Técnico de Soporte Plataformas