If you are using VMware or other virtualization software that can use
Intel VT (http://www.intel.com/technology/virtualization/) you may find
that it is not turned on by default.

 To turn it on usually you merely have access your BIOS and enable it
from there. Followed by a cold reboot - that means that you actually
turn the machine completely off, leave for 10 seconds and then turn on
again.

 If your machine has a straight forward BIOS access, lucky you - it took
me a few tries to find out that to access the ROM BASED SETUP
configuration was what I wanted (F10 on start up). Then nav to System Configuration > Device Configurations > Virtualization Technology
(Enable). Then COLD reboot.

 Hope that helps for the Compaq 6720s laptop owners out there. Nice
little machine. I'm pretty chuffed with it.

 More on what I'm doing with Virtualization in later posts.

 Hat tip to this forum for the pointers:
http://forum.parallels.com/showthread.php?t=4835