Windows Defender Solution Can’t Activate

Windows Defender is a built-in Windows antivirus program that has a fairly good ability to detect dangerous threats that if they enter a computer system. But there is a separate reason where Windows Defender can’t be activated.

One of the reasons why this feature cannot be activated is that there are other antivirus programs that have managed access to computer security. This is applied to increase the effectiveness in carrying out scanningso that the computer does not overwork when using additional antivirus programs.

Well, if on your computer you don’t have an additional antivirus but Windows Defender still can’t be activated, that means there is an error in the system. In many cases, this is due to a previous antivirus program having problems during the uninstallation process or uninstall.

Solving Windows Defender Cannot Be Activated

On average, when Windows Defender cannot be activated, the words “Security at a glance” on the screen. But don’t worry, because this problem can be solved in a fairly simple way.

Here are easy steps to solve it:

  1. First run Command Prompt as administrator.

  2. Then type the code below, or click here to copy the command code.

    REG DELETE HKLMSOFTWAREPoliciesMicrosoftWindows Defender /v DisableAntiSpyware
  3. Paste the command code in the Command Prompt and press ENTER.

  4. Last step please restart computer.

After restarting the computer, Windows Defender should now be immediately active without any more disturbance. But if it’s still the same, please repeat the steps above again and make sure again that you have run the command prompt program as an administrator. Because if without administrator rights, surely the above command will not work for the system.

Also read: 5 Tips to Prevent Computers from Ransomware Viruses


The cause of Windows Defender that can’t be activated is usually because Uninstall process failure from previous antivirus program. Usually the process of uninstalling an antivirus program is carried out using a separate program, for example, Avast and ESETso the process runs smoothly.

But sometimes the system still detects that the antivirus program is still there and has not been uninstalled, and that indicates that the removal process of the previous antivirus program has not been completely successful. Therefore, the easiest way to fix it so that Windows Defender can be reused is to delete something on the registry according to the code above.

Windows Defender or what is now called Microsoft Defender Antivirus has grown quite well over time, allowing you to not need another antivirus program to protect your computer.

Hopefully useful and good luck