Note: Click images to enlarge
Click on "Start", "Programs", "Windows Virtual PC" then "Windows XP Mode".
You now get the license agreement, read....
....and then select "I accept the license terms" (If you do) to continue, the "Next" button will then be available, click it to continue.
Now input password (Required), (username cannot be changed until you are in Windows XP), click "Next" to continue.
Now your security settings, make selection (They can be changed later on) and click "Next" to continue.
A note just to let you know that XP mode will have access to your files and folders, click "Start Setup" to continue.
XP Mode will now install.....
After a period of time the Virtual machine will initialise.
Then XP Professional will start....
In the center of your desktop a new Windows will appear, with XP pro running in it.