answer:Yes, she can. Just start the installation of Windows XP, and format the hard drive when asked to make partitions, or just select the partition with Vista and choose yes when asked to overwrite current Windows installation. After the XP install, look for drivers for your computer on your manufacturer's website, which work with XP. you can also stay with Vista and try it. Nearly all my programs work with Vista... If you need any 'clearification', ask me. HTH, Davey.