Error Code 0x800b0100

  1. Posts : 1
    Windows 10

    Error Code 0x800b0100

    When start the Windows 10 each time, When I click on the Microsoft Defender to open the window. I get the following Error. Last Three days, I browse the internet, but I could not find correct solution, can anyone help me to resolve this issue.

    Microsoft Security Client

    An error has occurred in the program during initialization. Of this problem continues, please contact your system administrator.

    Error Code: 0x800b0100
    Last edited by gcfernando; 10 Aug 2016 at 06:11.
      My Computer

  2. Posts : 112
    Win 7

    welcome , this is the same question like you
      My Computer

  3. Posts : 40,126
    Win 7 32, Win 7 64 Pro, Win 8.1 64 Pro, Win 10 64 Education Edition, Win 11 Pro

    Have you scanned with any malware scanners to see if malware has compromised your system? Recommended scanners are Malwarebytes (Free version) & AdwCleaner.

    If no malware is detected, suggest you run a SFC to check if any of your files are corrupted/can be repaired. Option 3 is recommended.

    SFC Command - Run in Windows 10 - Windows 10 Forums

    Note   Note
    If SFC could not fix something, then run the command again to see if it may be able to the next time. Sometimes it may take running the sfc /scannow command up to 3 times with Fast Startup turned off and restarting the computer after each time to completely fix everything that it's able to.

    If not, then run the Dism /Online /Cleanup-Image /RestoreHealth command to repair any component store corruption, restart the PC afterwards, and try the sfc /scannow command again.

    If still not, then do a system restore using a restore point dated before the bad system file occurred to fix it. You may need to repeat doing a system restore until you find a older restore point that may work.

    If still not, then you could do a repair install without losing anything.

    If still not, then you could refresh Windows 10.
      My Computer


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