Question Windows Security/Defender turns off when 3rd Party Antivirus is installed ?

Vellaura

Great
Nov 30, 2020
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Basically the title, I was told that windows security doesn't even operate when you have a 3rd party anti virus installed, or more so gets turned off. Is this true?

I thought windows security and kaspersky (for example) worked back to back ?

Thanks :)
 
Last edited:

PC Tailor

Judicious
Ambassador
3rd party anti virus installed, or more so gets turned off. Is this true?
That is correct in the vast majority of cases. Effectively the 3rd party antivirus indicates to Windows Defender that it will take over the active role of protecting the system.

Generally anti-virus should not run simultaneously, due to the way they work, they can easily end up conflicting an causing damage or corruption. You also don't need more than 1 anti-virus. Thus why 1 will disable for the other.

The exception to this for example can be Malwarebytes, Adware software etc. As these are made to effectively approach some or specific malware in a different way, and are usually made not to conflict with those antivirus, doesn't mean they don't, but they shouldn't.
 

Colif

Win 10 Master
Moderator
Mostly. It depends on if the 3rd party AV does all the same things as Defender.

Many free ones don't include a Firewall so Defender will still be used for that function.
If you pay for the security suites they mostly include a Firewall and replace it completely.
 
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