Windows defender cannot be enabled (windows defender cannot be started)

Hello everyone, Lin Fei to answer the above questions, windows defender can not be enabled, windows defender can not start a lot of people do not know, now let's take a look!

After upgrading and installing Win10, some users found that the built-in killing software Windows Defender could not start properly, and found that these users basically upgraded from Win7 and may have used MSE before. Although MSE is normally cleaned after an upgrade, there are cases where it is not cleaned, which may lead to problems with Windows Defender startup. There are two steps to solve this problem.

First, remove the MSE residue.

1. Navigate to the following path in File Explorer:

C:\ program file\ Microsoft secure client\

two。 Right-click the Setup.exe file and select property compatibility to change the settings for all users.

3. Check "run in compatibility mode", select Windows7 from the drop-down menu, and click "OK" to save.

4. Run the command prompt as an administrator and execute the following command:

C:\ Program Files\ Microsoft Security Client\ setup. Exe/x/disableoslimit

5. After the command is executed, select Uninstall to restart the computer.

Second, restore Windows Defender services

1. Enter "services" in the Cortana search bar and enter (you can also perform services.msc during operation).

two。 Check to see if Windows Defender-related services are disabled, and if so, try to enable them, as shown in the following figure:

3. You can also run the command prompt in administrator mode and execute the following command to start the service:

Sc configuration WinDefend start=auto

Sc starts WinDefend

It is important to note that if your computer has a third-party software killer installed, Windows Defender will not start by default.

At the end of this article, I hope it will be helpful to you.