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Missing Operating system when installing Hyper-V 2012 RRS feed

  • Question

  • Hi,

    I have installed Hyper-V 2012 on Windows 7.

    During the installation it has restarted at some point and is not able to load the OS anymore.

    I see a black screen with the message "Missing operating system".

    In the boot menu there are two options:

    Internal HDD  - returns "Missing operating system" when selected

    Onboard NIC -returns "Selected boot device failed. Press any key to reboot the system."  Pressing a key ends in the "Missing operating system"  message.

    Machine is Dell Latitude E7240

    Windows 7 x64

    The operating system is installed on C drive and I have chosen in the setup wizard of Hyper-V 2012 the D drive - considering not to interfere with the OS. Now I am wondering if this was a bad idea.

    Please help me to boot the Windows7 OS again.

    I found this error on the  web, but nothing which could solve the problem.

    Thank you!


    Sunday, October 18, 2015 1:04 PM

All replies

  • boot with your win7 DVD to perform an advanced repair of your BCD or hit F8 during boot to go into recovery to see if it can be repaired
    Wednesday, October 21, 2015 7:32 PM
  • yes, that worked,

    thank you.

    Friday, October 23, 2015 6:56 AM