Workaround for "This host has virtualization support, but virtualization technology is disabled" when installing a 64-bit system in VMware

You have configured this virtual machine to use a 64-bit guest operating system. However, 64-bit operating systems are not available. This host has virtualization support capabilities, but virtualization technology is disabled.
This is usually because the virtualization technology has been set or disabled in the BIOS/firmware or the host does not have permission to change this setting. Please:
(1) Verify bios/firmware settings VT Enable and disable ' trusted execution. '
(2) If these bios/firmware settings are changed, reboot the host power.
(3) Install the VMware Workstation and reboot the host.
(4) Update to the latest version of the bios/firmware.
For more details, see http://vmware.com/info?id=152.
Do you want to continue without a 64-bit support?

The above for the Chinese version of the hint, the English original hints as follows:

You are configured this virtual machine to use a 64-bit guest operating system. However, 64-bit operation is not possible. This host was vt-capable, but the VT is disabled.
This is usually because VT have been disabled in the Bios/firmware settings or the host have not been power-cycled since Cha Nging this setting. Please:
(1) Verify that the Bios/firmware settings enable VT and disable ' trusted execution. '
(2) Power-cycle the host, if either of these bios/firmware settings have been changed.
(3) Power-cycle the host, if you are not doing so since installing VMware Workstation.
(4) Update the host ' s Bios/firmware to the latest version.
For more detailed information, see http://vmware.com/info?id=152.

Continue without 64-bit support?

Windows Server 2003 was successfully installed under VMware, and when you installed the 64-bit version of Windows Server R2 Enterprise, you encountered the above error message and could not continue to install the system. The computer itself is a 64-bit windows7, so it should be sure that the CPU is supported by 64-bit systems, and here's my workaround:

1. Check whether the CPU supports VT, can be viewed with cpu-z, and see Vt-x, indicating that the CPU is virtualization-enabled

2. Turn on VT, there are many CPUs are not open VT by default, you need to manually modify in the BIOS. Take my ThinkPad as an example:
A) first shut down, can not be restarted into the BIOS, you need to shut down the computer, and then boot
b) Press F1 to enter the BIOS
c) Enter the CONFIG-CPU, you can see that there are two disable status, change to enable.
d) F10 Save quit reboot

3. Reinstall VMware
Completely uninstall VMware, the installation process is very simple, not much to say. This is a problem if you don't reinstall VMware.
Uninstall VMware Well, after reinstalling VMware, the original installation of the successful system is still in, no impact.

4. Installing the System
This is also very simple, also do not say.

From:http://www.cnblogs.com/zhujian/archive/2011/05/15/2056232.html

Y480 under

1) Uninstalling VMware

2) shutdown, can not be restarted into the BIOS, you need to shut down the computer, and then boot
3) Press F2 to enter the BIOS
4) into the configuration, you can see Intel virtual technology is disable status, changed to enable.
5) F10 Save exit reboot

6) Installing VMware