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 me

LAHF (Load AH from Flags) and SAHF (Store AH to Flags) are CPU instructions required by ESXi 5.5 to support 64-bit hardware virtualization. Some early 64-bit CPUs lack LAHF/SAHF support in 64-bit mode, causing ESXi to report that hardware virtualization is unavailable. Enabling this feature in BIOS where supported, or replacing the CPU with a compatible one, resolves the error.

An absent or disabled NX/XD bit generates a separate, distinct error about execute-disable support, not the hardware virtualization message.

SSE3 is a SIMD floating-point instruction extension and is not a prerequisite checked by ESXi 5.5 during installation for hardware virtualization.

Hyperthreading is an Intel feature for simultaneous multithreading and is not a hardware virtualization requirement checked during ESXi 5.5 installation.