Disable nocheckCPUIDLimit on ESX4i

on install : press TAB and add “nocheckCPUIDLimit” after “vmkernel.gz”

mboot.c32 vmkernel.gz nocheckCPUIDLimit

on first boot : press shift + O at the ESX load screen and type

nocheckCPUIDLimit

Once installed using vSphere client disable CPUID check by unchecking the option:

Configuration -> Advanced Settings -> VMkernel -> Boot -> VMKernel.Boot.checkCPUIDLimit