
Not XP by far
Win 7 has many more security features that are not a part of XP or Vista for that. Like the fact that your user account doesn't run with system level privileges or the fact that firewall that is included has many more features and has been greatly improved. All the Aero theme is just a visual and feel upgrade. As far as the actual OS it's self Microsoft has been on a mission patenting lots of Linux apps that we linux users have enjoyed for a long time as well as implementing some *nix security features like the afore mentioned user running as the system root. Hence the annoying UAP that everyone turns off. I have always taken advantage of the fact that people hate to be disturbed and used that as a leverage point when popping Windows boxes at the local coffee shop. Turning Aero off will only free system resources that have been killing Windows boxes as of late. All that needed to be done in my opinion was to just secure XP and small visual cues needed to be changed. Aero is the reason I made to change full time over to Ubuntu.