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IIRC hardware CPU virtualization enabled in BIOS could have some negative impact/bugs on some SW, and also open the SW to some security vulnerabilities so it's

• sumtechguy 4y ago
  Another reason is market segmentation. This model has xyz, but for 50 more you can have one that does this cool thing. Even though the hardware is there. Pretty much all of the large OEM's do this. In the micro economics world it is called 'perfect pricing'. Basically segmenting your product enough and putting the prices at the right spot so everyone wants to buy along curve. In practice it is harder to do than that. So you get weird bits of hardware that can do things but are fused out. Car manufactures are trying to do this with 'rent your heated seats' kind of things. On the back end it simplifies what you buy into your pipeline and you control it with software.
• rb12345 4y ago
  It's true that Blue Pill and friends were an issue 15 years ago. I would have expected VT-x to be on by default now though given that Windows 10 and 11 both use virtualisation for various security features (Credential Guard, HVCI and so on). There's no advantage to disabling it... (Edit: of course, that wasn't the case when this particular article and BIOS was written.)