Installing an Antivirus will now turn off Microsoft Defender

by Claudiu Andone

Windows & Software Expert
  • Microsoft Defender Antivirus is the first line of defense against malware and other threats.
  • The software giant will disable the DisableAntiSpyware registry key used for turning off Microsoft Defender.
  • For more information about the most used operating system visit our Windows 10 section.
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Microsoft Defender turns itself off when it detects another antivirus

 Antivirus offers great protection for your computer, especially after the new ATP security cross-platform.


However, many admins and users are disabling Microsoft Defender to install other antivirus programs in a convenient way, just changing a registry key.

Now, Microsoft wants to disable the DisableAntiSpyware registry key used for turning off Microsoft Defender starting with the Windows 10 August 2020 update.

Microsoft has acknowledged the fact in the documentation page for the DisableAntiSpyware registry key.


Why is Microsoft disabling the DisableAntiSpyware registry key?

The first alarming reactions from the users required another update of the above-mentioned documentation from Microsoft which now explained their action:


This is a legacy setting that is no longer necessary as Microsoft Defender antivirus automatically turns itself off when it detects another antivirus program. This setting is not intended for consumer devices, and we’ve decided to remove this registry key. This change is included with Microsoft Defender Antimalware platform versions 4.18.2007.8 and higher KB 4052623.

To put this into more simple words, the registry key is no longer needed as Microsoft Defender will turn off if and when it detects another antivirus program.

We only recommended disabling Microsoft Defender in particular, unusual situations as the feature is the main line of defense against malware, viruses, and other threats for your PC.

If the Windows Defend doesn’t turn on, this excellent guide will help you fix the problem.

What do you think about this change from Microsoft? Share your opinion in the Comments section below.

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Technical Support Team
Technical Support Team
1 year ago

Is Windows Defender Good Enough?
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When you install Windows 10, you’ll have an antivirus program already running. Windows Defender comes built-in to Windows 10, and automatically scans programs you open, downloads new definitions from Windows Update, and provides an interface you can use for in-depth scans. Best of all, it doesn’t slow down your system, and mostly stays out of your way—which we can’t say about most other antivirus programs.

RELATED: Do I Really Need Antivirus If I Browse Carefully and Use Common Sense?

For a short while, Microsoft’s antivirus fell behind the others when it came to comparative antivirus software tests—way behind. It was bad enough that we recommended something else, but it’s since bounced back, and now provides very good protection.
So in short, yes: Windows Defender is good enough (as long as you couple it with a good anti-malware program, as we mentioned above—more on that in a minute).

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