How to Troubleshoot Windows Defender Error 0x800705b4 on Windows PC

Last Updated on April 6, 2022



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The 0x800705b4 error is very annoying because it occurs on two different occasions. Some users reported getting the error when running a Windows Defender scan, and some users reported getting the error when installing the latest Windows update.

And once the error 0x800705b4 appears, it prevents users from performing tasks. So in this article, you will learn how to fix Windows Defender error 0x800705b4 in Windows 10 as well as its causes.

What causes Window Defender error 0x800705b4?

  • Operating system update error.
  • Damaged or corrupted Windows system files.
  • Windows update service is not configured to automatically update the system.
  • The error occurs due to an error in the registry.
  • Virus or malware attack.

How to fix Windows Defender error 0x800705b4?



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sfc-command

Initiate the SFC tool

  1. Press the Windows + X key and select Command Prompt (Admin).
  2. Then type the following at the command prompt and press Enter:
    Sfc /scannow.
  3. Wait for the above process to complete, then restart your computer.

Launch the Windows Update Troubleshooter

  1. Now type “Troubleshooting” in the Windows search bar and click on Troubleshooting.
  2. Then select the Show All option in the left pane.
  3. Then select the Windows Store Apps option in the Computer Troubleshooting list.
  4. Follow the instructions on the screen and run the Windows Update troubleshooter.
  5. Reboot your computer and you might be able to resolve the Windows Defender error 0x800705b4.

Using the “Reset this PC” feature

  1. Press the Windows + I keys to open Settings, then select Update and Security.
  2. From the left menu, select Restore and click “First Steps” under Reset this PC.
  3. Select the “Save my files” option.
  4. Follow the instructions on the screen to complete the process.
  5. This will take some time, after which the computer will reboot.

Disable third-party antivirus services

  1. Right-click the antivirus icon in the taskbar and select Disable.
  2. Then select the period you want your antivirus to remain disabled.
  3. Then try logging in to Windows Defender again and see if Windows Defender error 0x800705b4 has been resolved.



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Frequently Asked Questions

Error 0x800705b4 is a hexadecimal data format that appears in Windows system when the system is infected with viruses or malware, damaged Windows system files, damaged Windows updates or registry errors.

  1. A virus or malware attack.
  2. Error updating the operating system.
  3. Damaged or corrupted Windows system files.
  4. The error occurs due to an error in the registry.
  5. Windows update service is not configured in the system as an automatic update.

  1. Type "Troubleshooting" in the Windows search bar and click on Troubleshooting.
  2. Then select the Show All option in the left pane of the window.
  3. Then select the Windows Store Apps option in the Computer Troubleshooting list.
  4. Follow the instructions on the screen and run the Windows Update troubleshooter.
  5. Reboot your computer and you might be able to fix Windows Defender error 0x800705b4.