I've been a longtime mac user, and although I still use my Macs, I recently got a Dell Latitude D600 running Windows XP. On my Mac, it was easy - there was one program you could use for playing DVDs. On XP, it seems like there are a bunch more. So, what's good? My Dell came with WinDVD, and Spirited Away just installed InterActual Player. I also get the the impression that both Real Player and Windows Media Player can also play DVDs. Any suggestions would be appreciated. Free is good.