Now, this could be due to a number of reasons. One of the main reasons why this error message occurs is when you uninstall a third-party antivirus from your system and then let Windows Defender take over. Secondly, this could also occur due to a bug with the Windows Defender version that you are using as it has been confirmed by several users. Nonetheless, we will go through these causes in detail down below. So, let’s get started. Now that we have gone through the possible causes of the issue, let us go through the different methods that you can use to get rid of it and get Windows Defender back on. So, without further ado, let us get into it.
Method 1: Update Windows
The first thing that you should do when you face this issue to update your Windows. Windows updates often contain updates for its Windows Defender that can solve various issues. As it turns out, in some cases, the issue can be associated with a specific Windows Defender version which is causing the error. Therefore, in order to solve this, you will have to check for Windows updates and then install them. To do this, follow the instructions given down below:
Method 2: Edit Windows Defender Registry
As it turns out, another reason due to which the error message can appear could be the Windows Defender Registry keys. Basically what happens is when you install a third-party antivirus on your system, it disables the Windows Defender by creating a registry key for it in the Windows Registry. This key is known as the DisableAntiSpyware key. Now, once you uninstall the third-party antivirus, in some cases the key is still there and thus, prevents Windows Defender from taking over. Therefore, in order to fix this, you will have to edit this key and set its value to 0. Follow the instructions down below to do this:
Method 3: Start Windows Defender Services
Finally, if the above solutions do not work out for you, it is probably because your issue is being caused by the Windows Defender services. As we have mentioned, Windows Defender relies on the Security Center and Windows Defender Antivirus Service, along with other, services to operate properly. If these services are not running and have been stopped, Windows Defender won’t be able to work. Therefore, you will have to make sure these services are running and their startup type is set to Automatic. This means they will start automatically when they are needed. To do this, follow the instructions down below:
FIX: Windows Defender Advanced Threat Protection Service is DisabledFIX: A problem has occurred in BitDefender threat scannerFix: Windows has stopped this device because it has reported problems. (code 43)…Fix: NVIDIA Code 43 (Windows has stopped this device because it has reported…
