I was wondering if there are any downsides (even theoretical) to enabling Hardware Virtualization in the BIOS. I noticed that it is disabled by default, and perhaps it is that way for a reason although I can't think of a good one.
My computer is an Intel-based (i7 QuadCore) HP EliteBook laptop, but I'm more interested in the general case.
Best Answer
One reason is security.
Root kits could use it to gain higher access to hardware than OS. Setting it to disabled mitigates this risk (see analysis).