During the installation of ESXi 5.5, the following error message is reported: Hardware
Virtualization is not a feature of the CPU, or is not enabled in the BIOS. Which condition
would generate this message?
A.
Hyperthreading is not enabled in the BIOS.
B.
LAHF/SAHF is not enabled in the BIOS.
C.
NX/XD is not enabled in the BIOS.
D.
SSE3 is not enabled in the BIOS.
B or C should be acceptable, but don’t have time to test.
http://vsphere-land.com/news/what-is-sahf-and-lahf-and-why-do-i-need-it-to-install-vsphere-51.html