Vista to windows xp

It is Possible. But before you do I want to point out a few things. Why go from Windows vista to xp when there is Windows 7. Windows xp is a 10 year old operating system. Programs are becoming not becoming compatible with xp. Windows xp is getting to old to handle the latest programs and web standards. If you still want to do this I would highly recommend you do not, but when you turn the computer on go to the bios and boot from disk drive. Then put the xp disk in the disk drive, after that exit the bios.