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Bitlocker recovery triggered after Hyper-V installation RRS feed

  • Question

  • I have a new laptop, ASUS ROG GL702VM. Running Windows 10 Pro version 1607 build 14393.321. I have bitlocker enabled on both OS and data drives. Everything is fine until I install Hyper-V. After Hyper-V installation, on first boot after clean shutdown, I get bitlocker recovery screen. If I shutdown again I can get into the system w/o bitlocker recovery.

    In Event viewer I see these warnings in Bitlocker-API Mgmt>Event 29 and 793

    In EV Hyper-V -Hypervisor I see Event 12550 that seems to correlate with the machine startup.

    It  happened on my first load, I thought it was a fluke so I did another fresh install but it happened again right after Hyper-V install.

    Are the 2 conflicting? Anyone run across this issue?


    Tuesday, October 18, 2016 3:12 PM

All replies

  • If you use a tpm as protector, hardware changes are watched and can be triggering bitlocker recovery. Virtual devices as Hyper-V network adapters (that get created on Hyper-V installation) might also trigger this.

    I use BL, I use Hyper-V on win10, but I can not remember that it did this for me, but hey, it's installed for over a year.

    Tuesday, October 18, 2016 4:11 PM
  • There is an official documentation introduces which situation can trigger recovery mode, please refer to it for some information.

    https://technet.microsoft.com/en-us/library/dn383583%28v=ws.11%29.aspx?f=255&MSPPError=-2147217396

    I suspect that enable Hyper-V would make change on BIOS then trigger BitLocker enter recovery mode when you first load, it should be a normal phenomenon, don’t worry about it.

    On my Windows 10 machine I also enable both of Hyper-V and BitLocker, I just need to enter password every time, these two features don't conflict.

    Besides, about event 12550 you can get a hint form this article.

    https://technet.microsoft.com/en-us/library/dd582495%28v=ws.10%29.aspx?f=255&MSPPError=-2147217396

    Regards


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    Wednesday, October 19, 2016 6:33 AM
    Moderator
  • @Teemo Tang: Do you use a TPM chip on your installation? Because you talk of a password, I guess you don't. Without a TPM, recovery mode will never get triggered.
    Wednesday, October 19, 2016 7:01 AM