Windows does not start (error code: 15)

Nice to meet you. My name is Asuka. I am Japanese.

Since I am not good at English, I will post on my google translation.

I am in trouble because the PC does not start.

[Operating environment]

PC: Windows 7 Professional 64bit

Tools: AOMEI Partition Assistant (I am sorry, I do not know the version)

[Operation Details]

1. I executed the join of the partitions.

2. The PC said "Please, restart manually".

3. I shut down the PC and started up.

4. "Error code: 15" is displayed on the PC.

I have read the FAQ (

Since windows does not start, I do not know how to reinstall the program.

I also tried restarting the startup.

"Error code: 0x490" is displayed on the PC.

Please let me know if you know the solution.


  • Try and boot from a Windows installation CD...

    Select "Repair" on the bottom left before you "install".

    Look for "Repair boot option" and see if this solves your problem.

  • Thank you for your reply!

    I will try to do the work you said.

    After that, I will report the results.

  • Sorry I'm late.

    The result of "startup repair" was not able to repair the computer automatically.

    The root cause found:


    Due to the installation or update of recently executed drivers, the system may not be able to start.

    Repair operation: System file integrity check and repair

    Result: Failed. Error code = 0x490

    Duration: = 903449 ms


    Although I tried repair installation from installation CD,

    "The system recovery option of this version is incompatible with the version of Windows you are trying to repair, please use a recovery disk compatible with this version of Windows" and proceed did not.

    Please tell me if there is no other way.

  • Can you upload a screenshot of boot interface with error message?

  • Hi admin.

    This is the screenshot of the error message.


  • Hi Asuka,

    I mean a screenshot of this:

    "Error code: 0x490" is displayed on the PC.

  • I'm sorry.

    Screenshot is displayed in Japanese, so I posted the translated result.

    Startup Repair

    Detailed diagnosis and repair:

    The root cause found:

    Due to the installation or update of recently executed drivers, it is possible that the system can not be started.

    Repair operating: System file integrity check and repair

    結果:失敗しました。 エラーコード = 0x490
    Result: Failed. Error code = 0x490

    所要時間 = 903449ミリ秒
    Time required = 903449 milliseconds


  • Sorry for the problem you encountered. Did you try to merge 2 partitions? Can you try our program AOMEI Boot Repair to see if it can fix the problem?

  • Yes, I tried to merge 2(or 3) partitions.

    I want to try it, but I don't understand the procedure.

    Could you tell me how to do "AOMEI Boot Repair"?

  • Thank you.
    I will try it, however I'll need a bit of time to do.
    Please wait for a few days.

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