As I recall, Microsoft initially said XP Home would run on 64MB, but 128MB was recommended.
In other words, define "run."
Without 1GB, as I understand it, XP churns the hard disk like a coffee grinder.
Ach!
Should have been:
Without 1GB, as I understand it, Vista churns the hard disk like a coffee grinder.
My machine has 2 Gb. It might get by with 1 Gb most of the time but sometimes it uses some of the second Gb.
LOL!