Device security yellow flag on my windows shield, when I look it shows core isolation - what to do?

[Woodfairy]

i got a new windows 11 in S mode - I don't have any mcafee or extra protection, should I buy some? also I am getting a device settings warning on my security shield icon which is yellow, when I click I see core isolation - it wants me to change settings but I don't know how or why? could you help please?

[Bill_To]

Hi @Woodfairy 

I have been getting this error on many W11 PCs after recent windows updates.

I have ignored or dismissed the error. Open Core Isolation in Windows Security. Dismiss or ignore the error.

Installing third party protection is up to you. I use third party primary malware protection as a personal choice. Also have Windows Security (WS) periodically run a quick scan.

WS has a very good cloud function that works well for known malware and zero day attacks. WS does not seem to do so good preventing ransomware infections.

 A multi layered defense approach has been working for me.

Windows Security does a good job. It's not perfect. But what is perfect on this planet?

Regards

[Woodfairy]

Thank you Bill, your help is very much appreciated.