Windows Defender Error Code 0x800705b4: Fix It Easily

Windows Defender is an inbuilt security software tool if you are using the Windows 10 Operating Software. This software is used to protect your windows against a virus attack. However, it is not free from technical glitches. if you see a Windows Defender Error Code 0x800705b4  on your Windows 10 Operating system, your OS may be affected by the virus. If you ever face this issue, then read this passage thoroughly, as, in the below part, we will assist you with all the troubleshooting techniques that will help you to get rid of from this issue. Check them out.

Why the Windows Defender Error Code 0x800705b4 occurs?

If you newly install the Windows 10 Operating System on your computer and suddenly you get this irritating error code. Then, it is compulsory for you, that you should understand why this error code generates.

Most of the time, if you install another security software with the Windows Defender, then this error appears on your Windows 10 screen.

If you are not updated your Windows 10 Operating System for more than a month, also then, you may deal with this error code.

Once, this error generates on your display, then some error message will appear on your screen. Such as :

The service will not be started

Error code: 0x800705b4

The operation returned

Now, have a look at the possible symptoms of this Windows defender error code 0x800705b4

Prominent Signs

After the occurrence of this error code, an error message error code: 0x800705b4 periodically appears on your screen. Windows will slowly response to the keyword and the mouse.

Now, look at the below troubleshooting techniques to fix this issue.

Easy Hacks to Fix Error Code 0x800705b4 when starting Windows Defender

A number of techniques can be used to get Windows Defender back to the working state. Read on:

Disable the third party Antivirus Services

As we have mentioned, most of the time due to the third party software this error code generates on your device. So, at first, you have to disable the third party software. To do that, at first you should right-click on the Antivirus Program button and then, click on the Disable option. Next, set the time frame for which you want to disable your antivirus. You should ideally choose the least duration of time, for example, 15 minutes or 30 minutes.

Once done, then restart your machine and now check if you see this error code on your Windows 10 Operating System or not. If yes, then look at the below method.

Enable the Windows Firewall

If the above method does not work for you, then you use the Control Panel to enable the Windows Firewall. To apply this method, firstly, press the Windows + I key together, then select the Control Panel. Within the Control Panel, you can find out a lot of options and from there, you need to click on the System and Security and after that, you have to tap on the Windows Firewall option.

Now, a new page will appear on your screen and from there click on the turn Windows Firewall on or off. If it is off, then Turn on your Windows Firewall and restart your machine. If you still face this issue, then try the next method.

Update Windows Defender

Sometimes, updating the Windows Defender may solve this issue. If this is the reason for the occurrence of this issue. Then, update your Windows Defender. So, at first, go to the windows settings and then click on the Update and Security button. Within it, you can see the Windows Defender. Now, see if an update is required. Or, is it working properly or not.

In case, any update is required, then upgraded it with its latest version.

After the updating process is completed, then again restart your machine and if this error code still pops up in the next set up, then go after the next method.


Scan your computer, can bring the possible result for you. So, you should press Windows and X keys together and select the Command Prompt. Now type “sfc/scannow” in the given field and press the Enter button.


After that, the scanning process may begin. It may take some time and provide you the below result:

  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 is always a good idea that you should scan your computer three times to troubleshoot this Windows Defender error code 0x800705b4 completely.

We believe this above information is sufficient to resolve this error code. So, follow the above-given troubleshooting technique and fix this issue on your own.

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