If you don't want Windows xp, then 2000 is your only other choice if not Linux http://support.asus.com/download.aspx?SLanguage=en&m=K8V-VM&os=17 (Offical Driver page for ASUS K8V drivers) I don't really understand why you would choose 2000 though. The only reasons I could really think of why you would choose W2k is less ram usage or software that doesn't work with xp. In my own personal experience setting up W2k's drivers were extremely difficult and time consuming and it lacks Zero Network Configuration, I couldn't even get the wireless internet working on the laptop. When I installed xp on the EXACT same laptop, it was a breeze to get everything working since lots of software didn't need to be installed (ex: Windows Installer, Codec's, etc). To top it all off, Windows xp still works with most modern software and you don't need to worry about web pages rendering incorrectly. W2k is still very usable I'm aware, if you do choose W2k I would recommend installing the unofficial service pack 5 and unofficial updates to get latest software working.