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17 Comments

  1. Cassey Chan
    October 21, 2021 @ 2:03 am

    I restored the last system restore point which has affected the Oracle drivers

    Reply

  2. chris
    May 11, 2021 @ 11:16 pm

    I have a fresh install of Windows 7 (no service pack) – installed VirtualBox 6.1.18 and it did not work – uninstalled and installed 6.1.20 – same thing did not work. The similar error as the article presents "Failed to open session for virtual machine". Then I found where someone said the fix was to install the extension pack for that version. So I did – and no that did not work. So I rolled back to 6.0.10 (which I know works on my other windows7 machine) and voila it works – but it's not the latest. If I uninstalled and re-installed, but run as Administrator can someone guarantee me that 6.1.20 will work on Windows 7?

    Reply

  3. Joey
    October 12, 2020 @ 11:34 am

    OMG THANK YOU SO MUCH

    Reply

  4. Greg
    September 16, 2020 @ 10:12 am

    Thanks, You saved my workday

    Reply

  5. Nuttapon
    July 17, 2019 @ 5:56 pm

    Its work. Thank you

    Reply

  6. Lawrence Williams
    July 10, 2019 @ 2:46 pm

    Correction to my last post, I now have it running!
    Basically I removed sandbox from my winpro version as suggested in a windows forum and then selected expert mode for the machine install, ensured that the vdl(?) link was pointed correctly and voila it now runs !

    Reply

  7. Lawrence Williams
    July 10, 2019 @ 1:44 pm

    has not solved my error. It still reports the following

    Failed to open a session for the virtual machine UBUNTU TEST.

    (VERR_NEM_MISSING_KERNEL_API).

    VT-x is not available (VERR_VMX_NO_VMX).

    Result Code: E_FAIL (0x80004005)
    Component: ConsoleWrap
    Interface: IConsole {872da645-4a9b-1727-bee2-5585105b9eed}

    Reply

    • lakonst
      July 10, 2019 @ 2:48 pm

      @Lawrence Williams: Follow the instructions on this article: FIX VirtualBox Error VT-x is not available

      Reply

      • Lawrence Williams
        July 10, 2019 @ 5:30 pm

        It is now running – fix as follows

        Basically I removed sandbox from my winpro version as suggested in a windows forum and then selected expert mode for the machine install, ensured that the vdl(?) link was pointed correctly and voila it now runs !

        Reply

  8. Lamees
    July 9, 2019 @ 2:20 am

    thank you I was just about to stop the work since yesterday I have been trying to find away fixing this problem, I do not know even how to thank youuuuuuuuuuuu

    Reply

  9. Nicolas
    June 25, 2019 @ 9:34 pm

    Thanks, I can fix the error re uninstall and re-install de virtualbox

    Reply

  10. Muhammad Aqeel
    June 14, 2019 @ 12:51 pm

    I have tried a new version of the virtual machine that's working but some files are missing as i am doing course on coursera and its requirement is virtual machine version 5.1.4. My assignments are overdue. Please help me.

    Reply

    • lakonst
      June 14, 2019 @ 2:44 pm

      @Muhammad Aqeel: You can download VirtualBox 5.1.4 from here. (File=VirtualBox-5.1.4-110228-Win.exe )

      Reply

  11. Ralph Milorian
    April 28, 2019 @ 8:38 pm

    This fix is so good thanks! I searched all over YouTube and google until I came across this helpful site.

    Reply

  12. Shraddha Thakkar
    March 12, 2019 @ 1:08 am

    Thank you so much. After almost a day later. I was able to fix my error in a minute after your webpage help. Thank you SO much.

    Reply

  13. Oliver Ryan Caliwag
    January 13, 2019 @ 7:20 am

    I have resolved the problem by right-clicking the Virtual Machine instance, then choose Start > Detachable Start

    Reply

    • John
      September 22, 2019 @ 10:05 pm

      10x this helped me

      Reply

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