FIX: Windows Update KB3093266 Failed to Install

If you get the error KB3093266  when trying to Update your system trough Windows Update then try the following steps to see if they resolve your problem, these are general troubleshooting tips since there is not yet a confirmed way of solving it.

1. Check your System for Corrupted System Files

Windows uses just like all your programs a lot of files to make everything happen on your operating system, if these become corrupted / damaged weird things can happen on your system, it is therefore advised to first scan and see if you have any of these corrupted files on your system.

System File Checker scans the system and finds and replaces corrupted system files with the correct one.

  1. On your keyboard press the Windows + X key at the same time, or right-click the Windows icon in your task bar
    Or open start and type CMD, then right-click command prompt and choose Run as Administrator
  2. Now click on Command Prompt (Admin)
    Power Menu: Command Prompt (admin) FIX: Windows Update KB3093266 Failed to Install

    Power Menu: Command Prompt (admin)

  3. Once Command Prompt has started, click the Window, and type “SFC /scannow” (without the “) and hit enter
    SFC FIX: Windows Update KB3093266 Failed to Install

    SFC

  4. Wait for this process to complete.

If you get a message that everything succeeded then try to run Windows Update again, if you get an error message which contains that corrupted files were found but cannot be repaired then please try to use a Restore Point

2. Run DISM.exe to solve updating problems

The next thing we are going to try is to use the Deployment Image Servicing and Management tool (DISM), this uses Windows Update to download files needed to fix corruptions on your system

To resolve this problem, use the inbox Deployment Image Servicing and Management (DISM) tool. Then, install the Windows update or service pack again.

  1. On your keyboard press the Windows + X key at the same time, or right-click the Windows icon in your task bar
    Or open start and type CMD, then right-click command prompt and choose Run as Administrator
  2. Now click on Command Prompt (Admin)
    Power Menu: Command Prompt (admin) FIX: Windows Update KB3093266 Failed to Install

    Power Menu: Command Prompt (admin)

  3. Once Command Prompt has started, click the Window, and type “DISM.exe /Online /Cleanup-image /Restorehealth” (without the “) and hit enter
    DISM FIX: Windows Update KB3093266 Failed to Install

    DISM

  4. Wait for this process to complete.

3. Clean Boot

After some time, the amount of programs and services on your computer will reach a high number, and this does not matter in most cases, however there can be one program between them which are causing the Windows update issues, therefore we going to try to do a clean boot.

  1. Press the Windows + R keys at the same time on your keyboard, a Run Window will appear, then type “msconfig” and hit enter
    or open start and type msconfig and then click on msconfig
    Run: MSConfig FIX: Windows Update KB3093266 Failed to Install

    Run: MSConfig

  2. Then choose Selective Startup
  3. Then make sure only Load System Servicesis checked.
    Clean boot 1 - 2 FIX: Windows Update KB3093266 Failed to Install

    Clean boot 1 – 2


  4. Now click on the Services tab
  5. Check the box: “Hide all Microsoft Services
  6. Click the button: “Disable All
  7. Click on OK and reboot your system when prompted.
    Clean boot 4-7 FIX: Windows Update KB3093266 Failed to Install

    Clean boot 4-7

Try to apply the Windows Updates again, if it now works then install them all. After you finished this make sure to repeat step 1 above and then choose Normal Startup.

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