WS2008-R2 Add Roles Hyper-V cannot be installed..

When trying to automate the build/deployment of Windows Server 2008 R2 Enterprise Edition (Full install) using scripts for adding roles and features beware using “start /w ocsetup Microsoft-Hyper-V” as this may break your server from successfuly performing a Hyper-V install..

If you do use that script then something (quite a lot) happens and various components appear to be installed including a restart.  Don’t be fooled in thinking Hyper-V has installed as when checking, Hyper-V isn’t listed as an installed Role and the management tool is not installed…

Later attempts to use the Add Roles Wizard to add Hyper-V reports it cannot be installed, giving this error dialogue:


The processor on this computer is not compatible with Hyper-V. To install this role, the processor must have a supported version of the hardware-assisted virtualization, and this feature must be turned on in the BIOS.

eek!  but my x64 bit server has hardware virtualisation support hasn’t it..?!?!?   of course the answer is yes, but this what you will see on a box that hasn’t.

After rebuilding my test platform I realised the fix to this was to revert the attempted Hyper-V scripted install by using:
start /w ocsetup Microsoft-Hyper-V /uninstall
Allow the Windows Optional Component Setup dialogue to restart when prompted

Hope this helps save you a rebuild!



  1. Kshitiz said

    I was facing the same issue installing X64 Bit Windows Server 2008 on my Q6600 Core 2 Quad system with Intel supported mother board. Host Machine showed it just enabled fine but the GUEST shoed the same prompt while trying to install.
    I used the command
    start /w ocsetup Microsoft-Hyper-V
    and it seems to be working. M<y machine has rebooted to configure it and feature install is 42 % complete..Crossed fingers here 🙂

    Thank You

  2. Manju said

    I am facing the same issue installing
    Dell PE1855
    OS : Win2008 EE R2 X64
    Pro : Intel(R)Xeon(TM) 3.20 Ghz.

    When I am running this command start /w ocsetup Microsoft-Hyper-V

    Its giving error message : The specified Windows Components could not be found

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