Not sure what you are talking about but if its NTFS encryption then I'm almost positive its available in NTFS under W2K as well. If you dont do NTFS encryption (or equivalent) then your files can be easily read by anyone who can boot the machine into another OS.Quote from 9999:
Another neat feature about XP is the higher level of security over personal folders and/or files. You cannot open or see them even when you're using another Microsoft OS in a different partition, while you can under Win2000.