64位win7中利用VM8安装64位的CentOS6.3VT禁用问题解决
利用VMware8安装CentOS6.3时出现了无法安装的问题，我本机的操作系统是64位的win7。安装CentOS6.3时VM报出的问题如下：
This virtual machine isconfigured for 64-bit guest operating systems. However, 64-bit operation is notpossible.
This host is VT-capable, butVT is disabled.
VT might be disabled if ithas been disabled in the BIOS settings or the host has not been power-cycledsince changing this setting.
(1) Verify that the BIOSsettings enable VT and disable 'trusted execution.'
(2) Power-cycle the host ifeither of these BIOS settings have been changed.
(3) Power-cycle the host ifyou have not done so since installing VMware Workstation.
(4) Update the host's BIOS tothe latest version.
For more detailedinformation, see http://vmware.com/info?id=152.
Continue without 64-bitsupport?
截图：
一开始还以为是下载的CentOS有问题，后来查了查资料，发现不是这个问题。仔细看报错的内容，发现有VT这个东西被禁用了，VT是什么？原来，VT就是Virtualization Technology（虚拟化），如果需要在VM中安装64位的虚拟机，必须要保证以下三个条件：
(1)CPU是64位的；
(2)CPU要支持VT技术；
(3)主板Bios设置要打开VT；
我的CPU是Intel i5四核，上述条件的前两个都满足，查看Bios设置，发现真的是VT没有打开，将CPU的VT开启，重新在VM中安装CentOS，安装成功。
附CentOS6.3下载地址：
http://www.cnbeta.com/articles/196464.htm
下载那个
CentOS-6.3-x86_64-bin-DVD1.iso 06-Jul-2012 10:20 4289386496
就行。
CentOS-6.3-x86_64-bin-DVD2.iso 06-Jul-2012 10:20 1536634880
是附带的软件包。
Intel VT开启方法：
进入BIOS
依次选择选择
Advanced menu
CPU configuration
intel(R) Virtualization Tech
选Enable