If you are using a computer with AMD processor and want to run any software or OS with virtualization technology, then AMD Virtualization is required. You need AMD virtualization for Windows 7 to run Windows XP mode, also other virtualization technology required software and OS, such as VMware ESX Server, and hypervisor server.

First, make sure your processor and motherboard support AMD virtualization technology by running below tool from AMD.

AMD Virtualization for Windows testing tool download

Windows XP mode in Windows 7 will work only if AMD virtualization is enabled on your AMD processor. After you ran the above tool and if you came to know that AMD virtualization is not enabled in your processor, you can enable it from BIOS.  What is Windows XP mode in Windows 7?

Read here how to enable Virtualization technology in mother board BIOS.

“AMD Virtualization (AMD-V™) Technology is a set of hardware extensions to the x86 system architecture that allows you to better utilize your resources, which make your servers, clients, and datacenters more effective.  AMD-V™ simplifies existing software only virtualization solutions by reducing and sometimes eliminating the burden of trapping and emulating instructions executed within a guest operating system.”

For some operating systems, you must disable the AMD virtualization in your computer. For example if you like to run Macintosh on Windows using VMware as mentioned here

.

Download a Free AMD Virtualization special edition Book.

This book nicely explains about AMD virtualization technology, and what you can do with it.

Read more about AMD Virtualization Windows Technology.