Microsoft - Windows Media Center Home

Windows Media Center is included only in Windows Vista Home Premium and Windows Vista Ultimate.

How you can enjoy Windows Media Center:

• Purchase Windows Vista Home Premium or Windows Vista Ultimate from a computer retailer.

• Purchase a full-packaged product from a retailer or download from Microsoft Store.

• Upgrade to Windows Vista with Windows Anytime Upgrade.

• Purchase a new computer with Windows Vista Home Premium or Windows Vista Ultimate pre-installed

More Information : http://www.microsoft.com/windows/windows-media-center/default.aspx