Using 64 bit Virtual Machines with ESX 3.5

in order to set up and install 64 bit Windows servers as virtual machines in ESX 3.5, a bios setting change has to be made.

1. enable VT
a. in bios, select Advanced Options -> Processor Options -> Intel VT
b. change from "Disabled" to "Enabled"
2. if that doesn't work, try
a. Advanced Options -> Processor Options -> No-Execute Page-Protection
b. change from "Disabled" to "Enabled"