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by q-big 1303 days ago
> What's the utility of being able to disable virtualization ?

I consider the option to disable (or rather: enable this function manually if you need it) virtualization to be quite useful because if this feature is disabled, malicious software cannot install a virtualization rootkit, i.e. a rootkit that makes itself a hypervisor and moves the current OS instance into a virtual machine running under this hypervisor.

See for example https://en.wikipedia.org/wiki/Blue_Pill_(software)