Also, if you have/get a DVD burner you won't be able to handle full DVD isos - because they'll be over 4 gig and FAT32 can't handle files that large. You won't be able to mount NTFS volumes on removable drives. You can't lock the machine from use if someone has physical access. You lose true multi-user profiles if you have more than one user on that machine. You limit your networking capabilities (might not be an issue - doubt you have a domain set up there if you don't like 2k and XP.) You can't play DOOM 3 - that should be enough in itself.