After upgrade from Windows 7 to Windows 10, optical drive unavailable in Windows. RRS feed

  • Question

  • This problem is occuring on a Toshiba Portege R835-P50x, after upgrade from Windows 7 Home to Windows 10. The suite of Toshiba system maintenance software that shipped with the laptop has not seen a version bump since the release of Windows 10 and their forums contain no information about this problem. 

    The internal optical drive no longer appears in the Device Manager (thus there is no way to enable/disable or make driver modifications).

    During boot, the Service Control Manager logs the following event to the System Log:

    Event ID: 7026

    The following boot-start or system-start driver(s) did not load: 

    Reviewing the System Drivers in msinfo32, the cdrom driver is "Stopped" but "Ok". The cdfs driver is "Stopped" "Disabled" and "Ok"

    So the questions are:

    (1) Is the failure to load the cdrom driver a symptom or the root cause of this problem?

    (2) How can I get that driver to load normally during boot?

    (3) What other steps can I take to get this drive working?

    Wednesday, October 28, 2015 6:12 PM


  • Right click on Start button > select Command Prompt (Admin)

    Now copy-paste the following command in Command Prompt and press Enter key:

    reg.exe add “HKLM\System\CurrentControlSet\Services\atapi\Controller0” /f /v EnumDevice1 /t REG_DWORD /d 0x00000001

    Reboot the computer.

    S.Sengupta, Windows Experience MVP

    • Marked as answer by infinitki Thursday, October 29, 2015 6:48 AM
    Thursday, October 29, 2015 12:37 AM