Windows 10: Computer black screen after Windows Defender cleanup


  1. Posts : 5,345
    Windows 10 Pro X64 16299.19
       4 Weeks Ago #1

    Computer black screen after Windows Defender cleanup


    Laptop owner said he ran Windows Defender and it cleaned up something (I don't know what). Now it boots to a black screen.

    I looked at Disk Management and it's not right:

    Click image for larger version. 

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Views:	2 
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ID:	158991

    I don't see any marked as System. How do I fix this?
      My ComputersSystem Spec


  2. Posts : 8,932
    Windows 10 (Pro and Insider Pro)
       4 Weeks Ago #2

    Boot to Macrium recovery and select other tasks / repair (or rebuild) boot.
    You can make Macrium recovery USB on other computer or use Kyhi's rescue disk.

    Check for malware too.
      My ComputerSystem Spec


  3. Posts : 5,345
    Windows 10 Pro X64 16299.19
    Thread Starter
       4 Weeks Ago #3

    I tried Macrium before I posted this, it didn't help. I should have mentioned that, sorry.

    I did fix this by using KYHI's Rescue WinPE disc then running the bootrec commands from a command prompt.

    bootrec /rebuildbcd
    bootrec /fixboot
    bootrec /fixmbr

    I think the first one did the trick but it now boots okay so I'm happy.
      My ComputersSystem Spec


  4. Posts : 8,932
    Windows 10 (Pro and Insider Pro)
       4 Weeks Ago #4

    Ztruker said: View Post
    I tried Macrium before I posted this, it didn't help. I should have mentioned that, sorry.

    I did fix this by using KYHI's Rescue WinPE disc then running the bootrec commands from a command prompt.

    bootrec /rebuildbcd
    bootrec /fixboot
    bootrec /fixmbr

    I think the first one did the trick but it now boots okay so I'm happy.
    did you check what went wrong? What's in Windows defender logs..
      My ComputerSystem Spec


  5. Posts : 5,345
    Windows 10 Pro X64 16299.19
    Thread Starter
       4 Weeks Ago #5

    I don't have the laptop any more, gave it back after cleaning up a few things.
      My ComputersSystem Spec


 

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