Is it possible to fix Windows Defender Error 0x80073b01

July 04, 2020 by Logan Cawthorn



If you receive a Windows Defender Error 0x80073b01, this guide has been written to help you. Error code 0x80073b01 indicates a failure between Windows Defender and another security program on your computer or that system files are corrupted and may interfere with its normal operation.


Error code 0x80073b01 indicates a problem exists between Windows Defender and another security program on your computer or that system files are corrupted and may interfere with normal operation.

This message may appear if you try to activate Windows Defender on your device and it fails. This error message only appears with some other symptoms, for example. For example, Windows Defender is not found in the control panel, and you cannot start it. You can still get a message that Windows Defender is running and protecting your computer. You may even be able to receive updates for this, but you will not be able to run it. You can even try to restore it using other anti-virus software or a recovery program, but most likely you won’t succeed.

There are a few things you can do to fix the Windows Defender problem, and be sure to try them all because they work in different situations, so one of them will certainly suit you.

Method 1.Remove Third-party Security Software

The first and most obvious problem is the removal of third-party security software. Third-party software such as Norton or McAfee is known to interfere with Windows's built-in security features. Therefore, it is very likely that this is a problem.

Method 2: Use The Registry Editor

August 2020 Update:




Registry Editor is a powerful tool that can often be used to solve such problems. The fact is that you need to know which keys you need to change, because improper use of the key can be fatal for your computer. Just follow the instructions in the following steps carefully.

Method 3: Run The System File Checker

System File Checker is a very powerful tool that comes with Windows and is designed to scan, search, and recover damaged system files. If the root directory of your Windows Defender problem is a damaged system file, this method will fix it.

Method 4: Checking For Updates

How do I install Microsoft Security Essentials on Windows 10?

Possible Windows Defender Error Messages After Installing Microsoft Security Essentials
  1. Open the Start menu and enter “services” in the search field. Click on Services.
  2. Locate and right-click the Windows Defender service. Select Properties from the menu.
  3. Set the startup type manually. Click OK to close the service properties window.

Another possible cause of the problem is that not all current updates are installed. The solution is very simple and does not require any technical knowledge if you follow these steps.

windows defender 0x80073b01 error

Since this is a fairly common problem, one of the above methods will certainly help you. Try them and see for yourself.

What is error code 0x800704ec?

Error code 0x800704ec is an error message informing you that your program cannot start. In most cases, this error code is caused by third-party antiviruses, such as Avast, Norton, and Malwarebytes. Sometimes this can also be due to corrupted system files or incorrect Group Policy settings.






error code 0x8004ff6f



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