0x800B0100

(Last Updated On: February 26, 2018)

Error 0x800B0100 When You Try To Install Windows Updates

Issue:

When you try to install the latest updates from Windows Updates or Microsoft Updates, you may receive the following error message:

Error(s) found:Code 800B0100 Windows Update encountered an unknown error.

0x800B0100
This issue may occur if a file needed by Windows Update is corrupted or missing.
Solution:

Windows 8.1 or Windows 8

Step 1: Run the Windows Update Troubleshooter

Run the Windows Update troubleshooter below, and then run Windows Update again. To start the troubleshooter, clickrun now:

Step 2: Use System File Checker to repair damaged Windows files

If the problem continues, use the System File Checker tool to repair damaged Windows files. To do this, follow these steps:

  1. Open an elevated command prompt.
  2. Run the “sfc /scannow” command.
  3. Try to install update again.

Step 3: Run the DISM tool

If the problem continues, use the Deployment Image Servicing and Management (DISM) tool to fix Windows Update corruption errors. To do this, follow these steps:

  1. Open an elevated command prompt.
  2. Run the “DISM.exe /Online /Cleanup-image /Restorehealth” command.
    Important When you run this command, DISM uses Windows Update to provide the files that are required to fix corruptions. However, if your Windows Update client is already broken, use a running Windows installation as the repair source, or use a Windows side-by-side folder from a network share or from a removable media, such as the Windows DVD, as the source of the files. To do this, run the following command instead:

    DISM.exe /Online /Cleanup-Image /RestoreHealth /Source:C:\RepairSource\Windows /LimitAccess

 

Windows 7

Step 1: Run the Windows Update Troubleshooter

Run the Windows Update troubleshooter below, and then run Windows Update again. To start the troubleshooter

Step 2: Use System File Checker to repair damaged Windows files

If the problem continues, use the System File Checker tool to repair damaged Windows files. To do this, follow these steps:

  1. Open an elevated command prompt.
  2. Run the “sfc /scannow” command.
  3. Try to install update again.

Step 3: Run the System Update Readiness tool

 

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0x800B0100