virtualbox.org

Yes

That is another known offender. If you google core isolation you will see the dreaded words virtualization-based security. That is like red flag if you want to run VirtualBox.

bigdata wrote:Yes

bigdata wrote:if someone has the same problem, you can suggest it.

Turning "Windows Defender > Device Security > Core Isolation" off is covered in I have a 64bit host, but can't install 64bit guests, second post, point 3. (I linked to this tutorial in my link above.)

I am not sure I understood correctly.

But OK

Scott was just pointing out that the core isolation problem is mentioned in the standard reply to this problem, which he had already referred to in a previous post (so it should not have come as a surprise to you).