Fix: Window Defender Error 0x800705b4

This error usually occurs when there is another third-party protection service installed along with Windows defender. So, a conflict is established between the two programs performing the same functionality. In this case, the third-party antivirus program should be disabled or uninstalled for the sake of Windows defender to work flawlessly.

Solutions to Fix the Error 0x800705b4:

A number of solutions can be used in order to get Windows defender back to its working state. As I mentioned in the reasons behind this error message, disabling the third party antivirus would be the best solution to resolve this issue. Follow the steps mentioned below.

If you have third party antivirus as well as firewall installed, then you might need to disable You should also make sure that Windows firewall in turned-on. You can enable it inside the Control panel. For this, go to Control panel by pressing

1. Win + X and select it from the list. Inside the control panel, click on Windows Firewall and click the Turn Windows Firewall on or off inside the left pane. In the next window, turn the firewall on and press OK thereafter.


2. Now, search for Windows Services panel by typing msc inside the cortana search field. Right click on program listed in the search result and run it as administrator.


3. After opening the Services, search for Windows Defender in the list and check if the Status column is blank or not. If it is blank, then right click on Windows Defender and select Start. If it doesn’t get started, then just change the startup to automatic and restart the computer again. Check if the problem still persists or not.


Additional Methods to Fix This Issue

Refresh Windows

  1. Press Windows Key once and select Settings
  2. Click Update & Security
  3. Click Recovery (located on the left side) and select Restart now under Advanced startup
  4. Click on Troubleshoot and select Reset this PC.
  5. Click Keep my files. If prompted, select an administrator account you want to provide credentials for and enter the password then click Ok
  6. If you are asked to Insert Media, you need to insert a Windows 10 installation media or recovery drive to continue the process
  7. Select the Windows 10 installation that you want to refresh and click Reset to begin

Refreshing Windows 10 will now start. This will take a while to finish, and your PC will restart a few times during the process. When finished, sign in to Windows 10. Each user that signs in for the first time after the refresh will go through first start up again before seeing their desktop


  1. Hold Windows key and press X (Release Windows Key) then select Command Prompt (Admin)
  2. Type sfc /scannow and press Enter


It will take some time and will give you the results. The results can be

  1. Windows did not find any integrity violations
  2. Windows Resource Protection found corrupt files and repaired them
  3. Windows Resource Protection found corrupt files but was unable to fix some (or all) of them

It’s always a good idea to run SFC method 3 times to make sure all the problems are fixed.


Kevin Arrows

Kevin Arrows is a highly experienced and knowledgeable technology specialist with over a decade of industry experience. He holds a Microsoft Certified Technology Specialist (MCTS) certification and has a deep passion for staying up-to-date on the latest tech developments. Kevin has written extensively on a wide range of tech-related topics, showcasing his expertise and knowledge in areas such as software development, cybersecurity, and cloud computing. His contributions to the tech field have been widely recognized and respected by his peers, and he is highly regarded for his ability to explain complex technical concepts in a clear and concise manner.
Back to top button

Expert Tip

Fix: Window Defender Error 0x800705b4

If the issue is with your Computer or a Laptop you should try using Restoro which can scan the repositories and replace corrupt and missing files. This works in most cases, where the issue is originated due to a system corruption. You can download Restoro by clicking the Download button below.

Download Now

I'm not interested