Hyper-V V1:


Hyper-V R2:

975530            Stop error message on an Intel Xeon 5500 series processor-based computer that is running Windows Server 2008 R2 and that has the Hyper-V role installed: "0x00000101 - CLOCK_WATCHDOG_TIMEOUT"


974672            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


975354            A Hyper-V update rollup package is available for a computer that is running Windows Server 2008 R2


974598            You receive a "Stop 0x0000007E" error on the first restart after you enable Hyper-V on a Windows Server 2008 R2-based computer


976246            When you remove a virtual hard disk from a virtual machine in System Center Virtual Machine Manager 2008 R2, the .vhd file on the Hyper-V server is deleted without warning


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


975688            A snapshot may become corrupted when the Volume Shadow Copy Service (VSS) snapshot providers take more than 10 seconds to create it on a computer that is running Windows 7 or Windows Server 2008 R2


976639            The Virtual Machine Manager Service crashes when you add a virtual machine host that has more than 16 logical processors in VMM 2008 R2


976640            How to troubleshoot the "Not Responding" host status in VMM 2008


976724            The SUSE Linux Enterprise network configurations are lost after a Hyper-V Live Migration


976924            You receive Windows Time Service event IDs 24, 29, and 38 on a virtualized domain controller that is running on a Windows Server 2008-based host server with Hyper-V


977509            A pass-through disk that is assigned to a virtual machine is not migrated when you upgrade to Windows Server 2008 R2


977517            A computer that is running VMware cannot create a TCP connection to a NFS server that is running Windows Server 2008 R2


972045            Slow system response together with many other performance issues occur on a virtualization server that is running Windows Server 2008 and that has the Hyper-V role installed