When you will try to use VirtualBox on Windows 11 you can notice that VM performance is very low.

One of the reason can be Windows Hypervisor-enforced Code Integrity (HVCI).

The easiest way to check if it active is via Settings > Update & Security > Windows Security > Device security > Core isolation details > Memory integrity.

To turn it off run cmd as privileged user:

bcdedit /set hypervisorlaunchtype off

and restart the system.

Be aware, that HVCI is turned on to improve system security - so turn if off only when you really need it.

Ten kto umie pisze kod, ten kto nie umie pisze książki..., albo blog.

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