The error code 0x800704ec may occur when you are turning on the Windows Defender.
This Windows Defender error code 0x800704ec is an official Windows notification.
This post will walk you through 5 solutions to solve this Windows Defender problem.

What Is Error Code 0x800704ec?
The error code 0x80004ec is a Windows Defender error, occurring when you are turning on it.
When this error occurs, you will see the warning messageThis program isblocked by group policy.

For more information, contact your system administrator.
As a matter of fact, there are many reasons causing the Windows error code 0x800704ec.
Meanwhile, it also may be sparked by other reasons.

Meanwhile, do you know how to fix error code 0x800704ec?
If you have the same problem, try these solutions.
How to Fix Error Code 0x800704ec?
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Solution 1.
Enable Windows Defender Services
First of all, we will show you the first solution to error code 0x800704ec.
To fix this Windows Defender error, try enabling Windows Defender Services firstly.

Step 1: Open Services Window
Step 2: Enable Windows Defender Services
1.
Right-click these Windows Defender services one by one, and selectStartto enable it.
If this solution has crapped out, continue based on the following solutions.

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This post shows how to enable it in Windows Defender.
Solution 2.

So, so that solve the error code: 0x800704ec, try uninstalling or disabling the third-party antivirus software.
Here, we demonstrate how to uninstall the third-party antivirus software.
Besides uninstalling the third-party antivirus software, you could also choose to disable it.

Thus, it’s possible for you to clickhereto know more.
If this method has crapped out, just continue based on the following solutions.
Step 2: Change Value data
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender
2.

On the right blank side, select theREG_SZkey and double-click it.
Then change its value data to 0.
Solution 4.
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This Windows Defender error may occur when Windows Defender is blocked by the Group Policy.
So for solve this problem, you’re able to try changing the prefs of Group Policy.
The following section will show you the detailed operation steps.

On the right side, select theTurn off Windows DefenderAntivirusand double-click it to continue.
In the pop-up window, select theNot Configured, then clickApplyandOKto continue.
If this method is still not working, continue according to the next partition.
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Troubled by Windows Defender not turning on?
Here are full solutions to repair Windows Defender in Windows 11/10/8/7 and the best way for PC protection.
Solution 5.

Here, we will show you the detailed steps.
Then just input the following commands one by one.
like hitEnterafter each command.

In general, after you have tried the above solution, the error code 0x800704ec can be solved.
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I have encountered the error code 0x800704ec when running Windows Defender.
On the one hand, you may also encounter other problems besides the Windows Defender error 0x800704ec.
So so that protect your machine and data, you had better create a system image.

Thus, so that create a system image, you might take advantage of a piece ofprofessional backup software.
Here, MiniTool ShadowMaker is strongly recommended.
MiniTool ShadowMaker is designed to back up the operating system, disk, partition, files and folders.
And it is a piece offile sync softwareto sync files to two or more locations.
So, so you can back up the operating system, MiniTool ShadowMaker is the best choice.
Just poke the following button to get MiniTool ShadowMaker Trial.
When all steps are finished, you have successfully created a backup image.
This way can effectively protect your setup even though the Windows Defender fails to work.
Now, you have learned how to protect your system by creating system image.
After you fixed error code 0x800704ec, try protecting your box immediately.
if you catch the error code 0x800704ec when running Windows Defender, try these solutions.