设置BIOS中installed OS为ON.
启动U盘引导安装光盘后运行esxi安装程序
结果报错：
the system has found a problem on your machine and cannot continue. VMware ESXi can not run on this CPU. VMware ESXi requires a 64 Bit CPU with support for LAHF/SAHF in Long Mode.论坛提示：
4.1 Update 1 works fine as long as you don't run 64-bit guestsI eventually discovered that VMWare have tightened the CPU Requirements; it's in the 5.0 readme documentation as follows:
Upgrades and Installations for supported CPUs. vSphere 5.0 supports only CPUs that have LAHF and SAHF CPU instruction sets. During an installation or upgrade, the installer checks the compatibility of the host CPU with vSphere 5.0. For CPU support, see the VMware Compatibility Guide..
5.0 was very strict to hardware