Just found this info on the net.
Preloaded System and Software:
<font color="red"> The pre-installed Windows XP Media Center Edition 2005 (Update Rollup 2) is essentially Windows XP Professional Edition </font> with a variety of tools to help you to create, organize, and enjoy digital media ranging from music to home movies to photo slide shows. The Update Rollup 2 upgrade offers support for the Windows Media Center Extender technology built into XBox 360 game consoles, which lets you access entertainment from your Media Center PC--whether itÕs live and recorded TV and movies, music, photos or Online Spotlight--on any TV in the house.
It also comes preloaded with Microsoft Works (for working with word processing and spreadsheet documents), Symantec Norton Internet Security 2005 AntiSpyware Edition (with 60 days of LiveUpdate), PC Doctor, Encarta Encyclopedia 2005, Quicken New User Edition 2005, Microsoft Money 2005, RecordNow, WinDVD Player, Sonic DigitalMedia Plus, Sonic MyDVD Plus, Sonic DigitalMedia Archive, muvee AutoProducer, iTunes.
The included HP Image Zone Plus photo and imaging software makes it easy to organize, edit, share, print, protect, and store your photos and video clips. Organize and find your photos easily by timeline, keywords, and/or location using the unique photo-globe mapping tool. Remove red eye and fix other common problems. Share your photos quickly via e-mails that include thumbnails with links to the full-sized images--without downloading time-consuming attachments.