Windows update Windows Defender Won’t Turn On indicates Microsoft windows can not be updated and the upgrade will stop.  In this article we have given step by step instructions to resolve the issue.

Please bookmark this page by pressing Ctrl+D in your browser so that you can visit this page again, if your system restarts during the resolution process.

windows update error

The steps given below involves changing system setting and it can damage your PC if the steps are not followed properly. It is highly recommended that these steps  should be followed under supervision of an Expert technician. We will have no responsibility or liability in relation to any loss or damage that occurs in the process.

Affected Operating Systems:

  • Windows 10/Windows 10.1
  • Windows 8/8.1
  • Windows 7
  • Windows Vista

Common Error message:

  • Windows Defender Won’t Turn On – Windows could not search for new updates. An error occurred while checking for new updates for your computer. Some updates were not installed.
  • Error(s) found: Code Windows Defender Won’t Turn On Windows update encountered an unknown error.
    Windows update ran into a problem.
  • There were some problems installing updates, but we’ll try again later If you keep seeing this and want to search the web or contact support for information, this may help – Windows Defender Won’t Turn On
  • Windows Update Cannot Check For Updates – Windows Defender Won’t Turn On
  • Something went wrong, Please try again later. Windows update error dt_000 – Windows Defender Won’t Turn On

Reason for error:

The error usually occurs while updating windows, upgrading windows and installing new windows updates. Windows update can also cause Microsoft office (Outlook,Word,Excel etc) to throw Windows Defender Won’t Turn On error.  The error can occur due to following reasons:

  1. Slow Internet Connection
  2. Corrupt system data.
  3. Incompatible windows update.

How to Fix Windows update Windows Defender Won’t Turn On error:

  • SFC Scan

Open Command Prompt in elevated mode. To open Command prompt in Windows 10, type CMD in search bar (“Ask me anything“) and right click on it and Click on “Run as Administrator“. And in the next window click on Yes.

SFC scan

In command prompt type the following command:

sfc /scannow

sfc scan result

  • Disable Skype/Antivirus

Sometimes Skype and any installed antivirus can conflict with windows update. While updating the windows disable them. You can enable them once the update is done successfully.

If  Windows update Windows Defender Won’t Turn On error still persists even after following the above steps, it means the issue is critical and it should be fixed by manually replacing the update files. It is highly recommended to talk to one of our Support specialist to get the issue resolved.

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Last Updated: 04/12/2016
Solution ID: 66422

Posted In: Windows Update

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